initial commit

2025-10-13 11:23:20 +04:00
commit e068ad52de
@@ -0,0 +1 @@
+/build
@@ -0,0 +1,60 @@
+plugins {
+    alias(libs.plugins.android.application)
+    alias(libs.plugins.kotlin.android)
+    alias(libs.plugins.kotlin.compose)
+}
+
+android {
+    namespace = "net.sergeych.karabass"
+    compileSdk {
+        version = release(36)
+    }
+
+    defaultConfig {
+        applicationId = "net.sergeych.karabass"
+        minSdk = 24
+        targetSdk = 36
+        versionCode = 1
+        versionName = "1.0"
+
+        testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
+    }
+
+    buildTypes {
+        release {
+            isMinifyEnabled = false
+            proguardFiles(
+                getDefaultProguardFile("proguard-android-optimize.txt"),
+                "proguard-rules.pro"
+            )
+        }
+    }
+    compileOptions {
+        sourceCompatibility = JavaVersion.VERSION_11
+        targetCompatibility = JavaVersion.VERSION_11
+    }
+    kotlinOptions {
+        jvmTarget = "11"
+    }
+    buildFeatures {
+        compose = true
+    }
+}
+
+dependencies {
+    implementation(libs.androidx.core.ktx)
+    implementation(libs.androidx.lifecycle.runtime.ktx)
+    implementation(libs.androidx.activity.compose)
+    implementation(platform(libs.androidx.compose.bom))
+    implementation(libs.androidx.compose.ui)
+    implementation(libs.androidx.compose.ui.graphics)
+    implementation(libs.androidx.compose.ui.tooling.preview)
+    implementation(libs.androidx.compose.material3)
+    testImplementation(libs.junit)
+    androidTestImplementation(libs.androidx.junit)
+    androidTestImplementation(libs.androidx.espresso.core)
+    androidTestImplementation(platform(libs.androidx.compose.bom))
+    androidTestImplementation(libs.androidx.compose.ui.test.junit4)
+    debugImplementation(libs.androidx.compose.ui.tooling)
+    debugImplementation(libs.androidx.compose.ui.test.manifest)
+}
@@ -0,0 +1,21 @@
+# Add project specific ProGuard rules here.
+# You can control the set of applied configuration files using the
+# proguardFiles setting in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}
+
+# Uncomment this to preserve the line number information for
+# debugging stack traces.
+#-keepattributes SourceFile,LineNumberTable
+
+# If you keep the line number information, uncomment this to
+# hide the original source file name.
+#-renamesourcefileattribute SourceFile
@@ -0,0 +1,24 @@
+package net.sergeych.karabass
+
+import androidx.test.platform.app.InstrumentationRegistry
+import androidx.test.ext.junit.runners.AndroidJUnit4
+
+import org.junit.Test
+import org.junit.runner.RunWith
+
+import org.junit.Assert.*
+
+/**
+ * Instrumented test, which will execute on an Android device.
+ *
+ * See [testing documentation](http://d.android.com/tools/testing).
+ */
+@RunWith(AndroidJUnit4::class)
+class ExampleInstrumentedTest {
+    @Test
+    fun useAppContext() {
+        // Context of the app under test.
+        val appContext = InstrumentationRegistry.getInstrumentation().targetContext
+        assertEquals("net.sergeych.karabass", appContext.packageName)
+    }
+}
@@ -0,0 +1,27 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools">
+    <uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS" />
+    <application
+        android:allowBackup="true"
+        android:dataExtractionRules="@xml/data_extraction_rules"
+        android:fullBackupContent="@xml/backup_rules"
+        android:icon="@mipmap/ic_launcher"
+        android:label="@string/app_name"
+        android:roundIcon="@mipmap/ic_launcher_round"
+        android:supportsRtl="true"
+        android:theme="@style/Theme.Karabass">
+        <activity
+            android:name=".MainActivity"
+            android:exported="true"
+            android:label="@string/app_name"
+            android:theme="@style/Theme.Karabass">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+    </application>
+
+</manifest>
@@ -0,0 +1,399 @@
+package net.sergeych.karabass
+
+import android.content.Context
+import android.media.AudioAttributes
+import android.media.AudioFormat
+import android.media.AudioManager
+import android.media.AudioTrack
+import android.os.Build
+import kotlin.math.*
+
+class AdvancedTubaSynth(private val context: Context) {
+
+    companion object {
+        const val SAMPLE_RATE = 44100
+        const val CUTOFF_FREQ = 800.0
+
+        // Полный звуковой ряд тубы с полутонами (от C1 до B5)
+        val TUBA_NOTES = listOf(
+            // Октава 1
+            "C1" to 32.70f, "C#1" to 34.65f, "D1" to 36.71f, "D#1" to 38.89f, "E1" to 41.20f, "F1" to 43.65f,
+            "F#1" to 46.25f, "G1" to 49.00f, "G#1" to 51.91f, "A1" to 55.00f, "A#1" to 58.27f, "B1" to 61.74f,
+
+            // Октава 2
+            "C2" to 65.41f, "C#2" to 69.30f, "D2" to 73.42f, "D#2" to 77.78f, "E2" to 82.41f, "F2" to 87.31f,
+            "F#2" to 92.50f, "G2" to 98.00f, "G#2" to 103.83f, "A2" to 110.00f, "A#2" to 116.54f, "B2" to 123.47f,
+
+            // Октава 3
+            "C3" to 130.81f, "C#3" to 138.59f, "D3" to 146.83f, "D#3" to 155.56f, "E3" to 164.81f, "F3" to 174.61f,
+            "F#3" to 185.00f, "G3" to 196.00f, "G#3" to 207.65f, "A3" to 220.00f, "A#3" to 233.08f, "B3" to 246.94f,
+
+            // Октава 4
+            "C4" to 261.63f, "C#4" to 277.18f, "D4" to 293.66f, "D#4" to 311.13f, "E4" to 329.63f, "F4" to 349.23f,
+            "F#4" to 369.99f, "G4" to 392.00f, "G#4" to 415.30f, "A4" to 440.00f, "A#4" to 466.16f, "B4" to 493.88f,
+
+            // Октава 5 (верхний предел для продвинутых исполнителей)
+            "C5" to 523.25f, "C#5" to 554.37f, "D5" to 587.33f, "D#5" to 622.25f, "E5" to 659.25f, "F5" to 698.46f,
+            "F#5" to 739.99f, "G5" to 783.99f, "G#5" to 830.61f, "A5" to 880.00f, "A#5" to 932.33f, "B5" to 987.77f
+        )
+    }
+
+    @Volatile private var audioTrack: AudioTrack? = null
+    @Volatile private var isPlaying = false
+    @Volatile private var shouldStop = false
+    private var currentThread: Thread? = null
+
+    // Синхронизированные переменные для потокобезопасности
+    private val lock = Object()
+    private var currentFrequency = 0f
+    private var targetFrequency = 0f
+    private var isNoteOn = false
+    private var currentAmplitude = 0.0
+    private var samplesSinceNoteOn = 0
+    private var samplesSinceNoteOff = 0
+    private var phase = 0.0
+
+    // Явное состояние огибающей
+    private enum class EnvelopeState { IDLE, ATTACK, DECAY, SUSTAIN, RELEASE }
+    private var envelopeState = EnvelopeState.IDLE
+
+    // Оптимизированные параметры для уменьшения задержки
+    private val attackTime = (0.005 * SAMPLE_RATE).toInt()  // 5ms атака
+    private val decayTime = (0.03 * SAMPLE_RATE).toInt()    // 30ms спад
+    private val releaseTime = (0.05 * SAMPLE_RATE).toInt()  // 50ms релиз
+    private val sustainLevel = 0.8
+
+    fun startNote(frequency: Float) {
+        synchronized(lock) {
+            targetFrequency = frequency
+
+            if (!isNoteOn) {
+                // Новая нота - сбрасываем все счетчики
+                isNoteOn = true
+                samplesSinceNoteOn = 0
+                samplesSinceNoteOff = 0
+                envelopeState = EnvelopeState.ATTACK
+                currentFrequency = frequency
+
+                if (!isPlaying) {
+                    startAudioGeneration()
+                }
+            } else {
+                // Легато - быстрый переход
+                targetFrequency = frequency
+            }
+        }
+    }
+
+    fun stopNote() {
+        synchronized(lock) {
+            if (isNoteOn) {
+                isNoteOn = false
+                samplesSinceNoteOff = 0
+                // Переходим в состояние релиза только если мы не в IDLE
+                if (envelopeState != EnvelopeState.IDLE) {
+                    envelopeState = EnvelopeState.RELEASE
+                }
+            }
+        }
+    }
+
+    fun changeNote(frequency: Float) {
+        synchronized(lock) {
+            targetFrequency = frequency
+        }
+    }
+
+    private fun startAudioGeneration() {
+        shouldStop = false
+        isPlaying = true
+
+        // Минимальный буфер для low-latency
+        val bufferSize = 512 // ~11ms latency
+
+        try {
+            audioTrack = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
+                val attributes = AudioAttributes.Builder()
+                    .setUsage(AudioAttributes.USAGE_MEDIA)
+                    .setContentType(AudioAttributes.CONTENT_TYPE_MUSIC)
+                    .build()
+
+                val format = AudioFormat.Builder()
+                    .setSampleRate(SAMPLE_RATE)
+                    .setEncoding(AudioFormat.ENCODING_PCM_16BIT)
+                    .setChannelMask(AudioFormat.CHANNEL_OUT_MONO)
+                    .build()
+
+                AudioTrack.Builder()
+                    .setAudioAttributes(attributes)
+                    .setAudioFormat(format)
+                    .setBufferSizeInBytes(bufferSize * 2)
+                    .build()
+            } else {
+                @Suppress("DEPRECATION")
+                AudioTrack(
+                    AudioManager.STREAM_MUSIC,
+                    SAMPLE_RATE,
+                    AudioFormat.CHANNEL_OUT_MONO,
+                    AudioFormat.ENCODING_PCM_16BIT,
+                    bufferSize * 2,
+                    AudioTrack.MODE_STREAM
+                )
+            }
+
+            audioTrack?.play()
+        } catch (e: Exception) {
+            e.printStackTrace()
+            isPlaying = false
+            return
+        }
+
+        currentThread = Thread {
+            val buffer = ShortArray(bufferSize)
+
+            try {
+                while (!shouldStop && isPlaying) {
+                    // Заполняем буфер
+                    for (i in buffer.indices) {
+                        val sample = generateSample()
+                        buffer[i] = (sample.coerceIn(-1.0, 1.0) * Short.MAX_VALUE).toInt().toShort()
+                    }
+
+                    // Безопасная запись в AudioTrack
+                    val track = audioTrack
+                    if (track?.playState == AudioTrack.PLAYSTATE_PLAYING) {
+                        try {
+                            track.write(buffer, 0, buffer.size)
+                        } catch (e: Exception) {
+                            // Игнорируем ошибки записи при остановке
+                            if (!shouldStop) {
+                                e.printStackTrace()
+                            }
+                            break
+                        }
+                    } else {
+                        break
+                    }
+
+                    // Проверяем, нужно ли остановить генерацию
+                    synchronized(lock) {
+                        if (envelopeState == EnvelopeState.IDLE && !isNoteOn) {
+                            isPlaying = false
+                        }
+                    }
+                }
+            } catch (e: Exception) {
+                e.printStackTrace()
+            } finally {
+                // Безопасная остановка
+                try {
+                    audioTrack?.stop()
+                } catch (e: Exception) {
+                    e.printStackTrace()
+                }
+                isPlaying = false
+            }
+        }.apply {
+            start()
+        }
+    }
+
+    private fun generateSample(): Double {
+        synchronized(lock) {
+            // Быстрое изменение частоты для легато
+            if (abs(currentFrequency - targetFrequency) > 0.1) {
+                currentFrequency += (targetFrequency - currentFrequency) * 0.3f
+            }
+
+            // Расчет огибающей
+            val envelope = calculateEnvelope()
+
+            // Обновление счетчиков в зависимости от состояния
+            when (envelopeState) {
+                EnvelopeState.ATTACK, EnvelopeState.DECAY, EnvelopeState.SUSTAIN -> {
+                    samplesSinceNoteOn++
+                }
+                EnvelopeState.RELEASE -> {
+                    samplesSinceNoteOff++
+                }
+                EnvelopeState.IDLE -> {
+                    // Ничего не делаем
+                }
+            }
+
+            // Проверяем переходы между состояниями
+            checkStateTransitions()
+
+            // Если звук полностью затух, возвращаем 0
+            if (envelopeState == EnvelopeState.IDLE) {
+                return 0.0
+            }
+
+            // Генерация waveform с сохранением фазы для избежания щелчков
+            val wave = calculateTubaWaveform(currentFrequency)
+
+            return wave * envelope
+        }
+    }
+
+    private fun calculateEnvelope(): Double {
+        return when (envelopeState) {
+            EnvelopeState.ATTACK -> {
+                if (samplesSinceNoteOn < attackTime) {
+                    // Быстрая атака
+                    (samplesSinceNoteOn / attackTime.toDouble()).pow(0.5)
+                } else {
+                    // Переход к DECAY будет обработан в checkStateTransitions
+                    (attackTime / attackTime.toDouble()).pow(0.5)
+                }
+            }
+            EnvelopeState.DECAY -> {
+                val decayProgress = (samplesSinceNoteOn - attackTime) / decayTime.toDouble()
+                if (decayProgress < 1.0) {
+                    // Плавный спад до сустейна
+                    1.0 - (1.0 - sustainLevel) * decayProgress
+                } else {
+                    // Переход к SUSTAIN будет обработан в checkStateTransitions
+                    sustainLevel
+                }
+            }
+            EnvelopeState.SUSTAIN -> {
+                sustainLevel
+            }
+            EnvelopeState.RELEASE -> {
+                val releaseProgress = samplesSinceNoteOff / releaseTime.toDouble()
+                if (releaseProgress < 1.0) {
+                    // Экспоненциальный релиз
+                    sustainLevel * exp(-6.0 * releaseProgress)
+                } else {
+                    // Переход к IDLE будет обработан в checkStateTransitions
+                    0.0
+                }
+            }
+            EnvelopeState.IDLE -> {
+                0.0
+            }
+        }.also { currentAmplitude = it }
+    }
+
+    private fun checkStateTransitions() {
+        when (envelopeState) {
+            EnvelopeState.ATTACK -> {
+                if (samplesSinceNoteOn >= attackTime) {
+                    envelopeState = EnvelopeState.DECAY
+                }
+            }
+            EnvelopeState.DECAY -> {
+                if (samplesSinceNoteOn >= attackTime + decayTime) {
+                    envelopeState = EnvelopeState.SUSTAIN
+                }
+            }
+            EnvelopeState.SUSTAIN -> {
+                // SUSTAIN продолжается пока isNoteOn = true
+                if (!isNoteOn) {
+                    envelopeState = EnvelopeState.RELEASE
+                    samplesSinceNoteOff = 0
+                }
+            }
+            EnvelopeState.RELEASE -> {
+                if (samplesSinceNoteOff >= releaseTime) {
+                    envelopeState = EnvelopeState.IDLE
+                }
+            }
+            EnvelopeState.IDLE -> {
+                // Остаемся в IDLE
+            }
+        }
+    }
+
+    private fun calculateTubaWaveform(freq: Float): Double {
+        // Используем фазовый накопитель для избежания щелчков при смене нот
+        val phaseIncrement = 2.0 * PI * freq / SAMPLE_RATE
+        phase += phaseIncrement
+
+        // Сбрасываем фазу при переполнении для избежания потери точности
+        if (phase > 2.0 * PI) {
+            phase -= 2.0 * PI
+        }
+
+        val range = when {
+            freq < 50 -> "very_low"
+            freq < 100 -> "low"
+            freq < 200 -> "middle"
+            else -> "high"
+        }
+
+        val fundamental = sin(phase)
+
+        val overtones = when (range) {
+            "very_low" -> {
+                sin(2.0 * phase) * 0.6 +
+                        sin(3.0 * phase) * 0.5 +
+                        sin(4.0 * phase) * 0.4
+            }
+            "low" -> {
+                sin(2.0 * phase) * 0.5 +
+                        sin(3.0 * phase) * 0.45 +
+                        sin(4.0 * phase) * 0.4 +
+                        sin(5.0 * phase) * 0.3
+            }
+            "middle" -> {
+                sin(2.0 * phase) * 0.4 +
+                        sin(3.0 * phase) * 0.4 +
+                        sin(4.0 * phase) * 0.35 +
+                        sin(5.0 * phase) * 0.25 +
+                        sin(6.0 * phase) * 0.2
+            }
+            else -> {
+                sin(2.0 * phase) * 0.3 +
+                        sin(3.0 * phase) * 0.35 +
+                        sin(4.0 * phase) * 0.3 +
+                        sin(5.0 * phase) * 0.25 +
+                        sin(6.0 * phase) * 0.2
+            }
+        }
+
+        val mixed = fundamental * 0.6 + overtones * 0.8
+        return tanh(mixed * 1.2) / 1.2
+    }
+
+    fun isActive(): Boolean {
+        synchronized(lock) {
+            return isNoteOn || envelopeState != EnvelopeState.IDLE
+        }
+    }
+
+    fun getCurrentFrequency(): Float {
+        synchronized(lock) {
+            return currentFrequency
+        }
+    }
+
+    fun release() {
+        shouldStop = true
+        isPlaying = false
+
+        // Безопасная остановка потока
+        currentThread?.let { thread ->
+            try {
+                thread.join(100) // Ждем завершения потока до 100ms
+            } catch (e: InterruptedException) {
+                thread.interrupt()
+            }
+        }
+        currentThread = null
+
+        // Безопасное освобождение AudioTrack
+        audioTrack?.let { track ->
+            try {
+                if (track.playState == AudioTrack.PLAYSTATE_PLAYING) {
+                    track.stop()
+                }
+                track.release()
+            } catch (e: Exception) {
+                e.printStackTrace()
+            }
+        }
+        audioTrack = null
+    }
+}
@@ -0,0 +1,65 @@
+package net.sergeych.karabass
+
+import android.os.Bundle
+import androidx.activity.ComponentActivity
+import androidx.activity.compose.setContent
+import androidx.activity.enableEdgeToEdge
+import androidx.compose.foundation.layout.WindowInsets
+import androidx.compose.foundation.layout.asPaddingValues
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.statusBars
+import androidx.compose.material3.Scaffold
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.tooling.preview.Preview
+import net.sergeych.karabass.ui.theme.KarabassTheme
+
+class MainActivity : ComponentActivity() {
+
+    private lateinit var tubaSynth: AdvancedTubaSynth
+
+    private val tubaNotes = AdvancedTubaSynth.TUBA_NOTES
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+
+        tubaSynth = AdvancedTubaSynth(this)
+
+        // Примеры нот для тубы (в Hz)
+        enableEdgeToEdge()
+        setContent {
+            KarabassTheme {
+                Scaffold(modifier =
+                    Modifier.padding(top = WindowInsets.statusBars.asPaddingValues().calculateTopPadding())
+                ) { innerPadding ->
+                    val lowNodeIndex = 1
+                    val keysCount = 22
+                    PianoKeyboard(
+                        tubaSynth,
+                        AdvancedTubaSynth.TUBA_NOTES.slice(lowNodeIndex .. lowNodeIndex + keysCount).map { it.first},
+                        Modifier.padding(innerPadding).fillMaxSize()
+                    )
+
+                }
+            }
+        }
+    }
+}
+
+@Composable
+fun Greeting(name: String, modifier: Modifier = Modifier) {
+    Text(
+        text = "Hello $name!",
+        modifier = modifier
+    )
+}
+
+@Preview(showBackground = true)
+@Composable
+fun GreetingPreview() {
+    KarabassTheme {
+        Greeting("Android")
+    }
+}
@@ -0,0 +1,337 @@
+package net.sergeych.karabass
+
+import androidx.compose.foundation.Canvas
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.runtime.*
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.geometry.Offset
+import androidx.compose.ui.geometry.Rect
+import androidx.compose.ui.geometry.Size
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.graphics.drawscope.DrawScope
+import androidx.compose.ui.input.pointer.PointerId
+import androidx.compose.ui.input.pointer.pointerInput
+import androidx.compose.ui.input.pointer.positionChanged
+import androidx.compose.ui.platform.LocalConfiguration
+
+@Composable
+fun PianoKeyboard(
+    synth: AdvancedTubaSynth,
+    noteRange: List<String>,
+    modifier: Modifier = Modifier
+) {
+    val configuration = LocalConfiguration.current
+    val screenWidth = configuration.screenWidthDp
+    val screenHeight = configuration.screenHeightDp
+
+    val isHorizontal = screenWidth > screenHeight
+
+    // Фильтруем и сортируем ноты по частоте
+    val availableNotes = AdvancedTubaSynth.TUBA_NOTES
+        .filter { it.first in noteRange }
+        .sortedBy { it.second }
+
+    // Разделяем на белые и черные клавиши
+    val whiteKeys = availableNotes.filter { !it.first.contains("#") }
+    val blackKeys = availableNotes.filter { it.first.contains("#") }
+
+    var activeKeys by remember { mutableStateOf(emptySet<String>()) }
+
+    Box(modifier = modifier.fillMaxSize()) {
+        Canvas(
+            modifier = Modifier
+                .fillMaxSize()
+                .pointerInput(synth, whiteKeys, blackKeys, isHorizontal, availableNotes) {
+                    awaitPointerEventScope {
+                        // Карта для отслеживания активных указателей и их нот
+                        val activePointers = mutableMapOf<PointerId, String>()
+
+                        while (true) {
+                            val event = awaitPointerEvent()
+
+                            // Обрабатываем все изменения в событии
+                            for (change in event.changes) {
+                                val pointerId = change.id
+                                val position = change.position
+                                val canvasSize = Size(size.width.toFloat(), size.height.toFloat())
+
+                                // Находим клавишу под указателем
+                                val key = findKeyAtOffset(
+                                    offset = position,
+                                    size = canvasSize,
+                                    whiteKeys = whiteKeys,
+                                    blackKeys = blackKeys,
+                                    isHorizontal = isHorizontal
+                                )
+
+                                when {
+                                    // НАЖАТИЕ - когда указатель только что нажат
+                                    change.pressed -> {
+                                        key?.let { (noteName, frequency) ->
+                                            // Запоминаем связь указатель-нота
+                                            activePointers[pointerId] = noteName
+                                            activeKeys = activeKeys + noteName
+
+                                            println("startNote $noteName $frequency")
+                                            if (synth.isActive()) {
+                                                // Легато - плавный переход на новую ноту
+                                                synth.changeNote(frequency)
+                                            } else {
+                                                // Новая нота
+                                                synth.startNote(frequency)
+                                            }
+                                        }
+                                    }
+
+                                    // ОТПУСКАНИЕ - когда указатель отпущен
+                                    !change.pressed -> {
+                                        val releasedNoteName = activePointers.remove(pointerId)
+                                        releasedNoteName?.let { noteName ->
+                                            activeKeys = activeKeys - noteName
+
+                                            if (activePointers.isEmpty()) {
+                                                // Все клавиши отпущены - останавливаем ноту
+                                                synth.stopNote()
+                                            } else {
+                                                // Есть другие активные клавиши - переключаемся на одну из них
+                                                val remainingNoteName = activePointers.values.firstOrNull()
+                                                remainingNoteName?.let { name ->
+                                                    val remainingNote = availableNotes.find { it.first == name }
+                                                    remainingNote?.let {
+                                                        synth.changeNote(it.second)
+                                                    }
+                                                }
+                                            }
+                                        }
+                                    }
+
+                                    // ПЕРЕМЕЩЕНИЕ - когда указатель переместился
+                                    change.positionChanged() -> {
+                                        key?.let { (newNoteName, newFrequency) ->
+                                            val currentNoteName = activePointers[pointerId]
+
+                                            // Если указатель переместился на другую клавишу
+                                            if (currentNoteName != newNoteName) {
+                                                // Обновляем активные клавиши
+                                                currentNoteName?.let {
+                                                    activeKeys = activeKeys - it
+                                                }
+                                                activeKeys = activeKeys + newNoteName
+                                                activePointers[pointerId] = newNoteName
+
+                                                // Плавно переключаем ноту
+                                                if (synth.isActive()) {
+                                                    synth.changeNote(newFrequency)
+                                                }
+                                            }
+                                        }
+                                    }
+                                }
+
+                                // Всегда сообщаем, что обработали событие
+                                change.consume()
+                            }
+                        }
+                    }
+                }
+        ) {
+            if (isHorizontal) {
+                drawHorizontalKeyboard(
+                    whiteKeys = whiteKeys,
+                    blackKeys = blackKeys,
+                    activeKeys = activeKeys,
+                    size = size
+                )
+            } else {
+                drawVerticalKeyboard(
+                    whiteKeys = whiteKeys,
+                    blackKeys = blackKeys,
+                    activeKeys = activeKeys,
+                    size = size
+                )
+            }
+        }
+    }
+}
+
+// Вспомогательные функции остаются без изменений:
+
+private fun findKeyAtOffset(
+    offset: Offset,
+    size: Size,
+    whiteKeys: List<Pair<String, Float>>,
+    blackKeys: List<Pair<String, Float>>,
+    isHorizontal: Boolean
+): Pair<String, Float>? {
+    return if (isHorizontal) {
+        findKeyAtOffsetHorizontal(offset, size, whiteKeys, blackKeys)
+    } else {
+        findKeyAtOffsetVertical(offset, size, whiteKeys, blackKeys)
+    }
+}
+
+private fun findKeyAtOffsetHorizontal(
+    offset: Offset,
+    size: Size,
+    whiteKeys: List<Pair<String, Float>>,
+    blackKeys: List<Pair<String, Float>>
+): Pair<String, Float>? {
+    val whiteKeyWidth = size.width / whiteKeys.size
+
+    // Сначала проверяем черные клавиши (они сверху и могут перекрывать белые)
+    blackKeys.forEachIndexed { index, blackKey ->
+        val blackKeyX = (getWhiteKeyIndexForBlackKey(blackKey.first, whiteKeys) * whiteKeyWidth) -
+                (whiteKeyWidth * 0.25f)
+        val blackKeyRect = Rect(
+            left = blackKeyX,
+            top = 0f,
+            right = blackKeyX + whiteKeyWidth * 0.5f,
+            bottom = size.height * 0.6f
+        )
+        if (blackKeyRect.contains(offset)) {
+            return blackKey
+        }
+    }
+
+    // Затем проверяем белые клавиши
+    whiteKeys.forEachIndexed { index, whiteKey ->
+        val whiteKeyRect = Rect(
+            left = index * whiteKeyWidth,
+            top = 0f,
+            right = (index + 1) * whiteKeyWidth,
+            bottom = size.height
+        )
+        if (whiteKeyRect.contains(offset)) {
+            return whiteKey
+        }
+    }
+
+    return null
+}
+
+private fun findKeyAtOffsetVertical(
+    offset: Offset,
+    size: Size,
+    whiteKeys: List<Pair<String, Float>>,
+    blackKeys: List<Pair<String, Float>>
+): Pair<String, Float>? {
+    val whiteKeyHeight = size.height / whiteKeys.size
+
+    // Сначала проверяем черные клавиши (они справа и могут перекрывать белые)
+    blackKeys.forEachIndexed { index, blackKey ->
+        val blackKeyY = (getWhiteKeyIndexForBlackKey(blackKey.first, whiteKeys) * whiteKeyHeight) -
+                (whiteKeyHeight * 0.25f)
+        val blackKeyRect = Rect(
+            left = size.width * 0.4f,
+            top = blackKeyY,
+            right = size.width,
+            bottom = blackKeyY + whiteKeyHeight * 0.5f
+        )
+        if (blackKeyRect.contains(offset)) {
+            return blackKey
+        }
+    }
+
+    // Затем проверяем белые клавиши
+    whiteKeys.forEachIndexed { index, whiteKey ->
+        val whiteKeyRect = Rect(
+            left = 0f,
+            top = index * whiteKeyHeight,
+            right = size.width,
+            bottom = (index + 1) * whiteKeyHeight
+        )
+        if (whiteKeyRect.contains(offset)) {
+            return whiteKey
+        }
+    }
+
+    return null
+}
+
+private fun getWhiteKeyIndexForBlackKey(blackKeyName: String, whiteKeys: List<Pair<String, Float>>): Int {
+    // Для черной клавиши находим соответствующую белую клавишу справа
+    val baseNote = blackKeyName.replace("#", "")
+    val whiteKeyIndex = whiteKeys.indexOfFirst { it.first == baseNote }
+    return if (whiteKeyIndex >= 0) whiteKeyIndex + 1 else 0
+}
+
+private fun DrawScope.drawHorizontalKeyboard(
+    whiteKeys: List<Pair<String, Float>>,
+    blackKeys: List<Pair<String, Float>>,
+    activeKeys: Set<String>,
+    size: Size
+) {
+    val whiteKeyWidth = size.width / whiteKeys.size
+
+    // Рисуем белые клавиши
+    whiteKeys.forEachIndexed { index, (noteName, _) ->
+        val isActive = noteName in activeKeys
+        drawRect(
+            color = if (isActive) Color(0xFF64B5F6) else Color.White,
+            topLeft = Offset(x = index * whiteKeyWidth, y = 0f),
+            size = Size(width = whiteKeyWidth, height = size.height)
+        )
+
+        // Контур белой клавиши
+        drawRect(
+            color = Color.Black,
+            topLeft = Offset(x = index * whiteKeyWidth, y = 0f),
+            size = Size(width = 1f, height = size.height),
+            alpha = 0.3f
+        )
+    }
+
+    // Рисуем черные клавиши
+    blackKeys.forEachIndexed { index, (noteName, _) ->
+        val isActive = noteName in activeKeys
+        val whiteKeyIndex = getWhiteKeyIndexForBlackKey(noteName, whiteKeys)
+        val blackKeyX = (whiteKeyIndex * whiteKeyWidth) - (whiteKeyWidth * 0.25f)
+
+        drawRect(
+            color = if (isActive) Color(0xFF1976D2) else Color.Black,
+            topLeft = Offset(x = blackKeyX, y = 0f),
+            size = Size(width = whiteKeyWidth * 0.5f, height = size.height * 0.6f)
+        )
+    }
+}
+
+private fun DrawScope.drawVerticalKeyboard(
+    whiteKeys: List<Pair<String, Float>>,
+    blackKeys: List<Pair<String, Float>>,
+    activeKeys: Set<String>,
+    size: Size
+) {
+    val whiteKeyHeight = size.height / whiteKeys.size
+
+    // Рисуем белые клавиши
+    whiteKeys.forEachIndexed { index, (noteName, _) ->
+        val isActive = noteName in activeKeys
+        drawRect(
+            color = if (isActive) Color(0xFF64B5F6) else Color.White,
+            topLeft = Offset(x = 0f, y = index * whiteKeyHeight),
+            size = Size(width = size.width, height = whiteKeyHeight)
+        )
+
+        // Контур белой клавиши
+        drawRect(
+            color = Color.Black,
+            topLeft = Offset(x = 0f, y = index * whiteKeyHeight),
+            size = Size(width = size.width, height = 1f),
+            alpha = 0.3f
+        )
+    }
+
+    // Рисуем черные клавиши
+    blackKeys.forEachIndexed { index, (noteName, _) ->
+        val isActive = noteName in activeKeys
+        val whiteKeyIndex = getWhiteKeyIndexForBlackKey(noteName, whiteKeys)
+        val blackKeyY = (whiteKeyIndex * whiteKeyHeight) - (whiteKeyHeight * 0.25f)
+
+        drawRect(
+            color = if (isActive) Color(0xFF1976D2) else Color.Black,
+            topLeft = Offset(x = size.width * 0.4f, y = blackKeyY),
+            size = Size(width = size.width * 0.6f, height = whiteKeyHeight * 0.5f)
+        )
+    }
+}
@@ -0,0 +1,260 @@
+import android.content.Context
+import android.media.AudioAttributes
+import android.media.AudioFormat
+import android.media.AudioManager
+import android.media.AudioTrack
+import android.os.Build
+import kotlin.math.*
+import kotlin.random.Random
+
+class RealisticTubaSynth(private val context: Context) {
+
+    companion object {
+        const val SAMPLE_RATE = 44100
+        const val CUTOFF_FREQ = 800.0
+    }
+
+    private var audioTrack: AudioTrack? = null
+    private var isPlaying = false
+    private var currentThread: Thread? = null
+
+    data class TubaNote(
+        val frequency: Float,
+        val amplitude: Float = 0.8f,
+        val durationMs: Int
+    )
+
+    fun playTubaNote(frequency: Float, durationMs: Int = 1500) {
+        // Останавливаем предыдущее воспроизведение
+        stop()
+
+        val note = TubaNote(frequency, 0.8f, durationMs)
+        generateTubaSound(note)
+    }
+
+    private fun generateTubaSound(note: TubaNote) {
+        currentThread = Thread {
+            isPlaying = true
+            val numSamples = note.durationMs * SAMPLE_RATE / 1000
+            val buffer = ShortArray(numSamples)
+
+            // Фильтр для шума дыхания
+            val alpha = 1 - exp(-2.0 * PI * CUTOFF_FREQ / SAMPLE_RATE)
+            var filteredNoise = 0.0
+
+            val random = Random(System.currentTimeMillis())
+
+            for (i in 0 until numSamples) {
+                if (!isPlaying) break
+
+                val time = i.toDouble() / SAMPLE_RATE
+
+                // Основной waveform тубы с более богатым спектром
+                val tubaWave = calculateTubaWaveform(note.frequency, time)
+
+                // Шум дыхания с фильтром низких частот
+                val whiteNoise = random.nextDouble() * 2 - 1
+                filteredNoise += alpha * (whiteNoise - filteredNoise)
+
+                // Огибающая с резкой атакой и быстрым спадом
+                val envelope = getRealisticTubaEnvelope(i, numSamples, note.frequency)
+
+                // Усиление басов
+                val bassBoost = 1.0 + 0.5 * sin(2 * PI * 60.0 * time)
+
+                // Смешиваем всё вместе
+                var sample = tubaWave + filteredNoise * 0.03 * envelope
+                sample *= envelope * bassBoost
+
+                // Ограничиваем амплитуду
+                sample = sample.coerceIn(-1.0, 1.0)
+
+                buffer[i] = (sample * Short.MAX_VALUE).toInt().toShort()
+            }
+
+            if (isPlaying) {
+                playAudioBuffer(buffer)
+            }
+        }.apply {
+            start()
+        }
+    }
+
+    private fun calculateTubaWaveform(freq: Float, time: Double): Double {
+        // Классификация нот по диапазонам
+        val range = when {
+            freq < 40 -> "pedal"      // Педальные ноты (очень низкие)
+            freq < 80 -> "low"        // Низкий диапазон
+            freq < 160 -> "middle"    // Средний диапазон
+            freq < 240 -> "high"      // Высокий диапазон
+            else -> "very_high"       // Очень высокий диапазон
+        }
+
+        val fundamental = sin(2 * PI * freq * time)
+
+        // Разные наборы обертонов для разных диапазонов
+        val overtones = when (range) {
+            "pedal" -> {
+                // Педальные ноты: сильные низкие обертоны, меньше высоких
+                sin(2 * PI * freq * 2 * time) * 0.6 +
+                        sin(2 * PI * freq * 3 * time) * 0.5 +
+                        sin(2 * PI * freq * 4 * time) * 0.4 +
+                        sin(2 * PI * freq * 5 * time) * 0.3
+            }
+            "low" -> {
+                // Низкий диапазон: богатый спектр
+                sin(2 * PI * freq * 2 * time) * 0.5 +
+                        sin(2 * PI * freq * 3 * time) * 0.45 +
+                        sin(2 * PI * freq * 4 * time) * 0.4 +
+                        sin(2 * PI * freq * 5 * time) * 0.35 +
+                        sin(2 * PI * freq * 6 * time) * 0.25
+            }
+            "middle" -> {
+                // Средний диапазон: сбалансированный спектр
+                sin(2 * PI * freq * 2 * time) * 0.4 +
+                        sin(2 * PI * freq * 3 * time) * 0.4 +
+                        sin(2 * PI * freq * 4 * time) * 0.35 +
+                        sin(2 * PI * freq * 5 * time) * 0.3 +
+                        sin(2 * PI * freq * 6 * time) * 0.25 +
+                        sin(2 * PI * freq * 7 * time) * 0.2
+            }
+            "high" -> {
+                // Высокий диапазон: больше высоких обертонов
+                sin(2 * PI * freq * 2 * time) * 0.3 +
+                        sin(2 * PI * freq * 3 * time) * 0.35 +
+                        sin(2 * PI * freq * 4 * time) * 0.3 +
+                        sin(2 * PI * freq * 5 * time) * 0.25 +
+                        sin(2 * PI * freq * 6 * time) * 0.2 +
+                        sin(2 * PI * freq * 7 * time) * 0.15 +
+                        sin(2 * PI * freq * 8 * time) * 0.1
+            }
+            else -> {
+                // Очень высокий диапазон: яркий, с преобладанием высоких обертонов
+                sin(2 * PI * freq * 2 * time) * 0.25 +
+                        sin(2 * PI * freq * 3 * time) * 0.3 +
+                        sin(2 * PI * freq * 4 * time) * 0.25 +
+                        sin(2 * PI * freq * 5 * time) * 0.2 +
+                        sin(2 * PI * freq * 6 * time) * 0.15 +
+                        sin(2 * PI * freq * 7 * time) * 0.1 +
+                        sin(2 * PI * freq * 8 * time) * 0.08 +
+                        sin(2 * PI * freq * 9 * time) * 0.05
+            }
+        }
+
+        val mixed = fundamental * 0.6 + overtones * 0.8
+        return tanh(mixed * 1.2) / 1.2
+    }
+
+    private fun getRealisticTubaEnvelope(sampleIndex: Int, totalSamples: Int, frequency: Float): Double {
+        val position = sampleIndex.toDouble() / totalSamples
+
+        // Разная огибающая для разных диапазонов
+        val (attack, decay, sustain, release) = when {
+            frequency < 40 -> arrayOf(0.04, 0.2, 0.6, 0.15)  // Педальные ноты: медленнее
+            frequency < 100 -> arrayOf(0.025, 0.15, 0.65, 0.1) // Низкие: умеренные
+            frequency < 200 -> arrayOf(0.015, 0.1, 0.7, 0.08)  // Средние: быстрее
+            else -> arrayOf(0.01, 0.08, 0.75, 0.06)           // Высокие: очень быстрые
+        }
+
+        return when {
+            position < attack -> (position / attack).pow(0.3)
+            position < attack + decay -> {
+                val decayPos = (position - attack) / decay
+                1.0 - (1.0 - sustain) * decayPos
+            }
+            position > 1 - release -> {
+                val releasePos = (position - (1 - release)) / release
+                sustain * (1 - releasePos)
+            }
+            else -> sustain
+        }
+    }
+    private fun playAudioBuffer(buffer: ShortArray) {
+        try {
+            // Создаем новый AudioTrack каждый раз
+            val bufferSize = AudioTrack.getMinBufferSize(
+                SAMPLE_RATE,
+                AudioFormat.CHANNEL_OUT_MONO,
+                AudioFormat.ENCODING_PCM_16BIT
+            )
+
+            val newAudioTrack = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
+                val attributes = AudioAttributes.Builder()
+                    .setUsage(AudioAttributes.USAGE_MEDIA)
+                    .setContentType(AudioAttributes.CONTENT_TYPE_MUSIC)
+                    .build()
+
+                val format = AudioFormat.Builder()
+                    .setSampleRate(SAMPLE_RATE)
+                    .setEncoding(AudioFormat.ENCODING_PCM_16BIT)
+                    .setChannelMask(AudioFormat.CHANNEL_OUT_MONO)
+                    .build()
+
+                AudioTrack.Builder()
+                    .setAudioAttributes(attributes)
+                    .setAudioFormat(format)
+                    .setBufferSizeInBytes(bufferSize)
+                    .build()
+            } else {
+                @Suppress("DEPRECATION")
+                AudioTrack(
+                    AudioManager.STREAM_MUSIC,
+                    SAMPLE_RATE,
+                    AudioFormat.CHANNEL_OUT_MONO,
+                    AudioFormat.ENCODING_PCM_16BIT,
+                    bufferSize,
+                    AudioTrack.MODE_STATIC
+                )
+            }
+
+            newAudioTrack.apply {
+                setVolume(0.8f)
+
+                // Используем MODE_STATIC для однократного воспроизведения
+                write(buffer, 0, buffer.size)
+
+                setPlaybackPositionUpdateListener(object : AudioTrack.OnPlaybackPositionUpdateListener {
+                    override fun onMarkerReached(track: AudioTrack) {
+                        // Автоматически освобождаем после воспроизведения
+                        track.stop()
+                        track.release()
+                    }
+
+                    override fun onPeriodicNotification(track: AudioTrack) {}
+                })
+
+                setNotificationMarkerPosition(buffer.size)
+                play()
+            }
+
+            audioTrack = newAudioTrack
+
+        } catch (e: Exception) {
+            e.printStackTrace()
+            isPlaying = false
+        }
+    }
+
+    fun stop() {
+        isPlaying = false
+        currentThread?.interrupt()
+        currentThread = null
+
+        audioTrack?.let { track ->
+            try {
+                if (track.playState == AudioTrack.PLAYSTATE_PLAYING) {
+                    track.stop()
+                }
+                track.release()
+            } catch (e: IllegalStateException) {
+                // Игнорируем ошибки при остановке уже остановленного трека
+                e.printStackTrace()
+            }
+        }
+        audioTrack = null
+    }
+
+    fun release() {
+        stop()
+    }
+}
@@ -0,0 +1,199 @@
+package net.sergeych.karabass
+
+import android.content.Context
+import android.media.AudioAttributes
+import android.media.AudioFormat
+import android.media.AudioManager
+import android.media.AudioTrack
+import android.os.Build
+import kotlin.math.*
+import kotlin.random.Random
+
+class TubaSynth(private val context: Context) {
+
+    companion object {
+        const val SAMPLE_RATE = 44100
+        const val CUTOFF_FREQ = 500.0
+    }
+
+    private var audioTrack: AudioTrack? = null
+    private var isPlaying = false
+
+    data class TubaNote(
+        val frequency: Float,
+        val amplitude: Float = 0.8f,
+        val durationMs: Int
+    )
+
+    fun playTubaNote(frequency: Float, durationMs: Int = 2000) {
+        if (isPlaying) {
+            stop()
+        }
+
+        val note = TubaNote(frequency, 0.8f, durationMs)
+        generateTubaSound(note)
+    }
+
+    private fun generateTubaSound(note: TubaNote) {
+        Thread {
+            isPlaying = true
+            val numSamples = note.durationMs * SAMPLE_RATE / 1000
+            val buffer = ShortArray(numSamples)
+
+            // Фильтр для шума дыхания
+            val alpha = 1 - exp(-2.0 * PI * CUTOFF_FREQ / SAMPLE_RATE)
+            var filteredNoise = 0.0
+
+            val random = Random(System.currentTimeMillis())
+
+            for (i in 0 until numSamples) {
+                if (!isPlaying) break
+
+                val time = i.toDouble() / SAMPLE_RATE
+
+                // Основной waveform тубы
+                val tubaWave = calculateTubaWaveform(note.frequency, time)
+
+                // Шум дыхания с фильтром низких частот
+                val whiteNoise = random.nextDouble() * 2 - 1
+                filteredNoise += alpha * (whiteNoise - filteredNoise)
+
+                // Огибающая
+                val envelope = getTubaEnvelope(i, numSamples)
+
+                // Усиление басов
+                val bassBoost = 1.0 + 0.4 * sin(2 * PI * 80.0 * time)
+
+                // Смешиваем всё вместе
+                var sample = tubaWave + filteredNoise * 0.05 * envelope
+                sample *= envelope * bassBoost
+
+                // Ограничиваем амплитуду
+                sample = sample.coerceIn(-1.0, 1.0)
+
+                buffer[i] = (sample * Short.MAX_VALUE).toInt().toShort()
+            }
+
+            if (isPlaying) {
+                playAudioBuffer(buffer)
+            }
+        }.start()
+    }
+
+    private fun calculateTubaWaveform(freq: Float, time: Double): Double {
+        return (
+                sin(2 * PI * freq * time) * 0.6 +
+                        sin(2 * PI * freq * 2 * time) * 0.4 +
+                        sin(2 * PI * freq * 3 * time) * 0.3 +
+                        sin(2 * PI * freq * 4 * time) * 0.2 +
+                        sin(2 * PI * freq * 5 * time) * 0.15 +
+                        sin(2 * PI * freq * 6 * time) * 0.1 +
+                        sin(2 * PI * freq * 7 * time) * 0.05
+                ) * 0.6
+    }
+
+    private fun getTubaEnvelope(sampleIndex: Int, totalSamples: Int): Double {
+        val position = sampleIndex.toDouble() / totalSamples
+
+        val attack = 0.15
+        val decay = 0.1
+        val release = 0.3
+
+        return when {
+            position < attack -> {
+                val x = position / attack
+                x * x * (3 - 2 * x)
+            }
+            position < attack + decay -> {
+                val decayPos = (position - attack) / decay
+                0.9 + 0.1 * (1 - decayPos)
+            }
+            position > 1 - release -> {
+                val releasePos = (position - (1 - release)) / release
+                (1 - releasePos) * 0.9
+            }
+            else -> 0.9
+        }
+    }
+
+    private fun playAudioBuffer(buffer: ShortArray) {
+        try {
+            // Останавливаем предыдущее воспроизведение
+            audioTrack?.stop()
+            audioTrack?.release()
+
+            val bufferSize = AudioTrack.getMinBufferSize(
+                SAMPLE_RATE,
+                AudioFormat.CHANNEL_OUT_MONO,
+                AudioFormat.ENCODING_PCM_16BIT
+            )
+
+            // Создаем AudioTrack с правильными параметрами
+            audioTrack = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
+                val attributes = AudioAttributes.Builder()
+                    .setUsage(AudioAttributes.USAGE_MEDIA)
+                    .setContentType(AudioAttributes.CONTENT_TYPE_MUSIC)
+                    .build()
+
+                val format = AudioFormat.Builder()
+                    .setSampleRate(SAMPLE_RATE)
+                    .setEncoding(AudioFormat.ENCODING_PCM_16BIT)
+                    .setChannelMask(AudioFormat.CHANNEL_OUT_MONO)
+                    .build()
+
+                AudioTrack.Builder()
+                    .setAudioAttributes(attributes)
+                    .setAudioFormat(format)
+                    .setBufferSizeInBytes(bufferSize)
+                    .build()
+            } else {
+                @Suppress("DEPRECATION")
+                AudioTrack(
+                    AudioManager.STREAM_MUSIC,
+                    SAMPLE_RATE,
+                    AudioFormat.CHANNEL_OUT_MONO,
+                    AudioFormat.ENCODING_PCM_16BIT,
+                    bufferSize,
+                    AudioTrack.MODE_STREAM
+                )
+            }
+
+            audioTrack?.apply {
+                // Устанавливаем громкость
+                setVolume(0.8f)
+
+                // Воспроизводим
+                play()
+
+                // Пишем данные
+                write(buffer, 0, buffer.size)
+
+                // Ждем окончания воспроизведения
+                setNotificationMarkerPosition(buffer.size)
+                setPlaybackPositionUpdateListener(object : AudioTrack.OnPlaybackPositionUpdateListener {
+                    override fun onMarkerReached(track: AudioTrack) {
+                        stop()
+                        release()
+                        isPlaying = false
+                    }
+
+                    override fun onPeriodicNotification(track: AudioTrack) {}
+                })
+            }
+        } catch (e: Exception) {
+            e.printStackTrace()
+            isPlaying = false
+        }
+    }
+
+    fun stop() {
+        isPlaying = false
+        audioTrack?.stop()
+    }
+
+    fun release() {
+        stop()
+        audioTrack?.release()
+        audioTrack = null
+    }
+}
@@ -0,0 +1,11 @@
+package net.sergeych.karabass.ui.theme
+
+import androidx.compose.ui.graphics.Color
+
+val Purple80 = Color(0xFFD0BCFF)
+val PurpleGrey80 = Color(0xFFCCC2DC)
+val Pink80 = Color(0xFFEFB8C8)
+
+val Purple40 = Color(0xFF6650a4)
+val PurpleGrey40 = Color(0xFF625b71)
+val Pink40 = Color(0xFF7D5260)
@@ -0,0 +1,58 @@
+package net.sergeych.karabass.ui.theme
+
+import android.app.Activity
+import android.os.Build
+import androidx.compose.foundation.isSystemInDarkTheme
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.darkColorScheme
+import androidx.compose.material3.dynamicDarkColorScheme
+import androidx.compose.material3.dynamicLightColorScheme
+import androidx.compose.material3.lightColorScheme
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.platform.LocalContext
+
+private val DarkColorScheme = darkColorScheme(
+    primary = Purple80,
+    secondary = PurpleGrey80,
+    tertiary = Pink80
+)
+
+private val LightColorScheme = lightColorScheme(
+    primary = Purple40,
+    secondary = PurpleGrey40,
+    tertiary = Pink40
+
+    /* Other default colors to override
+    background = Color(0xFFFFFBFE),
+    surface = Color(0xFFFFFBFE),
+    onPrimary = Color.White,
+    onSecondary = Color.White,
+    onTertiary = Color.White,
+    onBackground = Color(0xFF1C1B1F),
+    onSurface = Color(0xFF1C1B1F),
+    */
+)
+
+@Composable
+fun KarabassTheme(
+    darkTheme: Boolean = isSystemInDarkTheme(),
+    // Dynamic color is available on Android 12+
+    dynamicColor: Boolean = true,
+    content: @Composable () -> Unit
+) {
+    val colorScheme = when {
+        dynamicColor && Build.VERSION.SDK_INT >= Build.VERSION_CODES.S -> {
+            val context = LocalContext.current
+            if (darkTheme) dynamicDarkColorScheme(context) else dynamicLightColorScheme(context)
+        }
+
+        darkTheme -> DarkColorScheme
+        else -> LightColorScheme
+    }
+
+    MaterialTheme(
+        colorScheme = colorScheme,
+        typography = Typography,
+        content = content
+    )
+}
@@ -0,0 +1,34 @@
+package net.sergeych.karabass.ui.theme
+
+import androidx.compose.material3.Typography
+import androidx.compose.ui.text.TextStyle
+import androidx.compose.ui.text.font.FontFamily
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.unit.sp
+
+// Set of Material typography styles to start with
+val Typography = Typography(
+    bodyLarge = TextStyle(
+        fontFamily = FontFamily.Default,
+        fontWeight = FontWeight.Normal,
+        fontSize = 16.sp,
+        lineHeight = 24.sp,
+        letterSpacing = 0.5.sp
+    )
+    /* Other default text styles to override
+    titleLarge = TextStyle(
+        fontFamily = FontFamily.Default,
+        fontWeight = FontWeight.Normal,
+        fontSize = 22.sp,
+        lineHeight = 28.sp,
+        letterSpacing = 0.sp
+    ),
+    labelSmall = TextStyle(
+        fontFamily = FontFamily.Default,
+        fontWeight = FontWeight.Medium,
+        fontSize = 11.sp,
+        lineHeight = 16.sp,
+        letterSpacing = 0.5.sp
+    )
+    */
+)
@@ -0,0 +1,170 @@
+<?xml version="1.0" encoding="utf-8"?>
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="108dp"
+    android:height="108dp"
+    android:viewportWidth="108"
+    android:viewportHeight="108">
+    <path
+        android:fillColor="#3DDC84"
+        android:pathData="M0,0h108v108h-108z" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M9,0L9,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,0L19,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M29,0L29,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M39,0L39,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M49,0L49,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M59,0L59,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M69,0L69,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M79,0L79,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M89,0L89,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M99,0L99,108"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,9L108,9"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,19L108,19"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,29L108,29"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,39L108,39"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,49L108,49"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,59L108,59"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,69L108,69"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,79L108,79"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,89L108,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M0,99L108,99"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,29L89,29"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,39L89,39"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,49L89,49"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,59L89,59"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,69L89,69"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M19,79L89,79"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M29,19L29,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M39,19L39,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M49,19L49,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M59,19L59,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M69,19L69,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+    <path
+        android:fillColor="#00000000"
+        android:pathData="M79,19L79,89"
+        android:strokeWidth="0.8"
+        android:strokeColor="#33FFFFFF" />
+</vector>
@@ -0,0 +1,30 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:aapt="http://schemas.android.com/aapt"
+    android:width="108dp"
+    android:height="108dp"
+    android:viewportWidth="108"
+    android:viewportHeight="108">
+    <path android:pathData="M31,63.928c0,0 6.4,-11 12.1,-13.1c7.2,-2.6 26,-1.4 26,-1.4l38.1,38.1L107,108.928l-32,-1L31,63.928z">
+        <aapt:attr name="android:fillColor">
+            <gradient
+                android:endX="85.84757"
+                android:endY="92.4963"
+                android:startX="42.9492"
+                android:startY="49.59793"
+                android:type="linear">
+                <item
+                    android:color="#44000000"
+                    android:offset="0.0" />
+                <item
+                    android:color="#00000000"
+                    android:offset="1.0" />
+            </gradient>
+        </aapt:attr>
+    </path>
+    <path
+        android:fillColor="#FFFFFF"
+        android:fillType="nonZero"
+        android:pathData="M65.3,45.828l3.8,-6.6c0.2,-0.4 0.1,-0.9 -0.3,-1.1c-0.4,-0.2 -0.9,-0.1 -1.1,0.3l-3.9,6.7c-6.3,-2.8 -13.4,-2.8 -19.7,0l-3.9,-6.7c-0.2,-0.4 -0.7,-0.5 -1.1,-0.3C38.8,38.328 38.7,38.828 38.9,39.228l3.8,6.6C36.2,49.428 31.7,56.028 31,63.928h46C76.3,56.028 71.8,49.428 65.3,45.828zM43.4,57.328c-0.8,0 -1.5,-0.5 -1.8,-1.2c-0.3,-0.7 -0.1,-1.5 0.4,-2.1c0.5,-0.5 1.4,-0.7 2.1,-0.4c0.7,0.3 1.2,1 1.2,1.8C45.3,56.528 44.5,57.328 43.4,57.328L43.4,57.328zM64.6,57.328c-0.8,0 -1.5,-0.5 -1.8,-1.2s-0.1,-1.5 0.4,-2.1c0.5,-0.5 1.4,-0.7 2.1,-0.4c0.7,0.3 1.2,1 1.2,1.8C66.5,56.528 65.6,57.328 64.6,57.328L64.6,57.328z"
+        android:strokeWidth="1"
+        android:strokeColor="#00000000" />
+</vector>
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@drawable/ic_launcher_background" />
+    <foreground android:drawable="@drawable/ic_launcher_foreground" />
+    <monochrome android:drawable="@drawable/ic_launcher_foreground" />
+</adaptive-icon>
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@drawable/ic_launcher_background" />
+    <foreground android:drawable="@drawable/ic_launcher_foreground" />
+    <monochrome android:drawable="@drawable/ic_launcher_foreground" />
+</adaptive-icon>
@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <color name="purple_200">#FFBB86FC</color>
+    <color name="purple_500">#FF6200EE</color>
+    <color name="purple_700">#FF3700B3</color>
+    <color name="teal_200">#FF03DAC5</color>
+    <color name="teal_700">#FF018786</color>
+    <color name="black">#FF000000</color>
+    <color name="white">#FFFFFFFF</color>
+</resources>
@@ -0,0 +1,3 @@
+<resources>
+    <string name="app_name">karabass</string>
+</resources>
@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+
+    <style name="Theme.Karabass" parent="android:Theme.Material.Light.NoActionBar" />
+</resources>
@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?><!--
+   Sample backup rules file; uncomment and customize as necessary.
+   See https://developer.android.com/guide/topics/data/autobackup
+   for details.
+   Note: This file is ignored for devices older than API 31
+   See https://developer.android.com/about/versions/12/backup-restore
+-->
+<full-backup-content>
+    <!--
+   <include domain="sharedpref" path="."/>
+   <exclude domain="sharedpref" path="device.xml"/>
+-->
+</full-backup-content>
@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="utf-8"?><!--
+   Sample data extraction rules file; uncomment and customize as necessary.
+   See https://developer.android.com/about/versions/12/backup-restore#xml-changes
+   for details.
+-->
+<data-extraction-rules>
+    <cloud-backup>
+        <!-- TODO: Use <include> and <exclude> to control what is backed up.
+        <include .../>
+        <exclude .../>
+        -->
+    </cloud-backup>
+    <!--
+    <device-transfer>
+        <include .../>
+        <exclude .../>
+    </device-transfer>
+    -->
+</data-extraction-rules>
@@ -0,0 +1,17 @@
+package net.sergeych.karabass
+
+import org.junit.Test
+
+import org.junit.Assert.*
+
+/**
+ * Example local unit test, which will execute on the development machine (host).
+ *
+ * See [testing documentation](http://d.android.com/tools/testing).
+ */
+class ExampleUnitTest {
+    @Test
+    fun addition_isCorrect() {
+        assertEquals(4, 2 + 2)
+    }
+}