シークバーで設定した周波数の音を鳴らしたい

前提・実現したいこと

android studioを使って、シークバーの値によって周波数、継続時間を調節した後、startボタンを押した瞬間に音が鳴るようにしたいです。

発生している問題・エラーメッセージ

エラーははいてないのですがstartボタンを押したときにタップ音のような音が数回鳴るだけでうまく音が鳴ってくれません。
また警告として39行目に'constructor AudioTrack(Int, Int, Int, Int, Int, Int)' is deprecated. Deprecated in Java　とでます。

該当のソースコード

kotlin
1package com.example.speaker
2
3
4import android.app.Activity
5import android.media.AudioFormat
6import android.media.AudioManager
7import android.media.AudioTrack
8import android.os.Bundle
9import android.view.Menu
10import android.view.View
11import android.widget.SeekBar
12import kotlinx.android.synthetic.main.activity_main.*
13import kotlin.String
14import java.util.*
15import kotlin.math.ceil
16import kotlin.math.sin
17
18
19class DigitalSoundGenerator(
20
21    private val sampleRate: Int, bufferSize: Int) {
22    val audioTrack: AudioTrack
23    private val bufferSize: Int
24
25    fun getSound(frequency: Double, soundLength: Double): ByteArray {
26        val buffer = ByteArray(ceil(bufferSize * soundLength).toInt())
27        for (i in buffer.indices) {
28            var wave = i / (sampleRate / frequency) * (Math.PI * 2)
29            wave = sin(wave)
30            buffer[i] = (if (wave > 0.0) Byte.MAX_VALUE else Byte.MIN_VALUE)
31        }
32        return buffer
33    }
34
35    init {
36        val sampleRate = 44100
37        this.bufferSize = bufferSize
38
39        audioTrack = AudioTrack(
40            AudioManager.STREAM_MUSIC,
41            sampleRate,  // サンプルレート
42            AudioFormat.CHANNEL_OUT_MONO,
43            AudioFormat.ENCODING_DEFAULT,
44            bufferSize,
45            AudioTrack.MODE_STREAM)
46    }
47}
48
49class SoundDto(
50    var sound: ByteArray,
51    var length: Double) {
52    init {
53        length = length
54    }
55}
56
57
58class MainActivity : Activity(), Runnable {
59
60    private var soundGenerator: DigitalSoundGenerator? = null
61    private var audioTrack: AudioTrack? = null
62    private val soundList: MutableList<SoundDto> = ArrayList()
63    private fun initScoreData() {
64        soundList.add(SoundDto(generateSound(soundGenerator, FREQ, HALF_NOTE), HALF_NOTE))
65
66    }
67
68    override fun onCreate(savedInstanceState: Bundle?) {
69        super.onCreate(savedInstanceState)
70        setContentView(R.layout.activity_main)
71        setupSeekBart()
72        setupSeekBarh()
73        soundGenerator = DigitalSoundGenerator(44100, 44100)
74        audioTrack = soundGenerator!!.audioTrack
75        findViewById<View>(R.id.start).setOnClickListener(object : View.OnClickListener {
76            override fun onClick(v: View?) {
77                val th = Thread(this@MainActivity)
78                th.start()
79            }
80        })
81
82        initScoreData()
83    }
84
85    private fun setupSeekBart()
86    {
87        seekbartime.progress = 0
88        seekbartime.max = 1000
89        seekbartime.setOnSeekBarChangeListener(
90            object : SeekBar.OnSeekBarChangeListener {
91                override fun onProgressChanged(seekBar: SeekBar, progress: Int, fromUser: Boolean) {
92                    val strt = String.format(Locale.US, "%d", progress)
93                    timedown.setText(strt)
94                    gTime = strt.toDouble()
95                }
96                override fun onStartTrackingTouch(seekBar: SeekBar) {
97                }
98                override fun onStopTrackingTouch(seekBar: SeekBar) {
99                }
100            })
101    }
102
103    private fun setupSeekBarh()
104    {
105        seekbarhz.progress = 0
106        seekbarhz.max = 10000
107        seekbarhz.setOnSeekBarChangeListener(
108            object : SeekBar.OnSeekBarChangeListener {
109                override fun onProgressChanged(seekBar: SeekBar, progress: Int, fromUser: Boolean) {
110                    val strh = String.format(Locale.US, "%d", progress)
111                    hzdown.setText(strh)
112                    gHz = strh.toDouble()
113                }
114                override fun onStartTrackingTouch(seekBar: SeekBar) {
115                }
116                override fun onStopTrackingTouch(seekBar: SeekBar) {
117                }
118            })
119    }
120
121    override fun onDestroy() {
122        super.onDestroy()
123        if (audioTrack!!.playState == AudioTrack.PLAYSTATE_PLAYING) {
124            audioTrack!!.stop()
125            audioTrack!!.release()
126        }
127    }
128
129    override fun onCreateOptionsMenu(menu: Menu?): Boolean {
130        menuInflater.inflate(R.menu.option, menu)
131        return true
132    }
133    fun generateSound(gen: DigitalSoundGenerator?, freq: Double, length: Double): ByteArray {
134        return gen!!.getSound(freq, length)
135    }
136
137    override fun run() {
138        if (audioTrack!!.playState == AudioTrack.PLAYSTATE_PLAYING) {
139            audioTrack!!.stop()
140            audioTrack!!.reloadStaticData()
141        }
142        audioTrack!!.play()
143        for (dto in soundList) {
144            audioTrack!!.write(dto.sound, 0, dto.sound.size)
145        }
146        audioTrack!!.stop()
147    }
148
149    companion object {
150        private var gTime: Double = 1.0
151        var HALF_NOTE = gTime
152        private var gHz: Double = 1.0
153        var FREQ = gHz
154    }
155}