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-rw-r--r--src/client/kotlin/space/autistic/radio/client/PirateRadioClient.kt12
-rw-r--r--src/client/kotlin/space/autistic/radio/client/cli/OfflineSimulator.kt4
-rw-r--r--src/client/kotlin/space/autistic/radio/client/flite/FliteFactory.kt15
-rw-r--r--src/client/kotlin/space/autistic/radio/client/fmsim/FastModulatedNoise.kt86
-rw-r--r--src/client/kotlin/space/autistic/radio/client/fmsim/FmFullMixer.kt4
-rw-r--r--src/client/kotlin/space/autistic/radio/client/fmsim/FmFullThread.kt294
-rw-r--r--src/client/kotlin/space/autistic/radio/client/fmsim/NoiseFloor.kt31
-rw-r--r--src/client/kotlin/space/autistic/radio/client/gui/FmReceiverScreen.kt82
-rw-r--r--src/client/kotlin/space/autistic/radio/client/sound/PirateRadioSoundInstance.kt72
-rw-r--r--src/client/kotlin/space/autistic/radio/client/sound/ReceiverAudioStream.kt43
-rw-r--r--src/client/kotlin/space/autistic/radio/client/util/LevenshteinDistance.kt54
-rw-r--r--src/client/resources/pirate-radio.client-mixins.json14
12 files changed, 654 insertions, 57 deletions
diff --git a/src/client/kotlin/space/autistic/radio/client/PirateRadioClient.kt b/src/client/kotlin/space/autistic/radio/client/PirateRadioClient.kt
index 1a68c21..87fd144 100644
--- a/src/client/kotlin/space/autistic/radio/client/PirateRadioClient.kt
+++ b/src/client/kotlin/space/autistic/radio/client/PirateRadioClient.kt
@@ -16,9 +16,12 @@ import space.autistic.radio.PirateRadio.MOD_ID
 import space.autistic.radio.PirateRadioEntityTypes
 import space.autistic.radio.client.entity.ElectronicsTraderEntityRenderer
 import space.autistic.radio.client.entity.DisposableTransmitterEntityRenderer
+import space.autistic.radio.client.fmsim.FmFullThread
 import space.autistic.radio.client.fmsim.FmSimulatorMode
 import space.autistic.radio.client.gui.FmReceiverScreen
 import space.autistic.radio.client.sound.PirateRadioSoundInstance
+import space.autistic.radio.client.sound.ReceiverAudioStream
+import javax.sound.sampled.Mixer
 import kotlin.math.max
 import kotlin.math.min
 
@@ -35,7 +38,16 @@ object PirateRadioClient : ClientModInitializer {
         }
     var mode = FmSimulatorMode.FULL
 
+    val minecraftAudioDevice = object : Mixer.Info("", "", "", "") {
+    }
+    val openAlAudioDevice = object : Mixer.Info("", "", "", "") {
+    }
+    val systemDefaultAudioDevice = object : Mixer.Info("", "", "", "") {
+    }
+    var audioDevice: Mixer.Info = if (ReceiverAudioStream.useNativeAudio) minecraftAudioDevice else openAlAudioDevice
+
     override fun onInitializeClient() {
+        Thread.ofPlatform().daemon().name("fm-receiver").start(FmFullThread)
         PirateRadio.proxy = ClientProxy()
         EntityRendererRegistry.register(PirateRadioEntityTypes.ELECTRONICS_TRADER, ::ElectronicsTraderEntityRenderer)
         EntityRendererRegistry.register(
diff --git a/src/client/kotlin/space/autistic/radio/client/cli/OfflineSimulator.kt b/src/client/kotlin/space/autistic/radio/client/cli/OfflineSimulator.kt
index 2646ed2..c17d622 100644
--- a/src/client/kotlin/space/autistic/radio/client/cli/OfflineSimulator.kt
+++ b/src/client/kotlin/space/autistic/radio/client/cli/OfflineSimulator.kt
@@ -231,7 +231,7 @@ fun main(args: Array<String>) {
                 w.y = plus100k.get()
                 z.cmul(w)
                 floatView.put(i, floatView.get(i) + z.x)
-                floatView.put(i, floatView.get(i) + z.y)
+                floatView.put(i + 1, floatView.get(i + 1) + z.y)
             }
             for (i in 0 until floatBufferLo.capacity() step 2) {
                 z.x = floatBufferLo.get(i)
@@ -243,7 +243,7 @@ fun main(args: Array<String>) {
                 w.y = -minus100k.get()
                 z.cmul(w)
                 floatView.put(i, floatView.get(i) + z.x)
-                floatView.put(i, floatView.get(i) + z.y)
+                floatView.put(i + 1, floatView.get(i + 1) + z.y)
             }
             if (rfOutput) {
                 outputStream.write(outputBuffer.array())
diff --git a/src/client/kotlin/space/autistic/radio/client/flite/FliteFactory.kt b/src/client/kotlin/space/autistic/radio/client/flite/FliteFactory.kt
index 993cbe9..768a040 100644
--- a/src/client/kotlin/space/autistic/radio/client/flite/FliteFactory.kt
+++ b/src/client/kotlin/space/autistic/radio/client/flite/FliteFactory.kt
@@ -9,23 +9,28 @@ import space.autistic.radio.wasm.Bindings
 import space.autistic.radio.wasm.WasmExitException
 import java.io.InputStream
 import java.lang.invoke.MethodHandles
+import kotlin.io.path.inputStream
 import kotlin.reflect.jvm.javaMethod
 
 object FliteFactory : () -> Instance {
     private fun fd_read(a: Int, b: Int, c: Int, d: Int): Int {
-        throw UnsupportedOperationException()
+        // EBADF
+        return 8
     }
 
     private fun fd_seek(a: Int, b: Long, c: Int, d: Int): Int {
-        throw UnsupportedOperationException()
+        // EBADF
+        return 8
     }
 
     private fun fd_close(a: Int): Int {
-        throw UnsupportedOperationException()
+        // EBADF
+        return 8
     }
 
     private fun fd_write(a: Int, b: Int, c: Int, d: Int): Int {
-        throw UnsupportedOperationException()
+        // EBADF
+        return 8
     }
 
     private fun proc_exit(status: Int): Nothing {
@@ -51,7 +56,7 @@ object FliteFactory : () -> Instance {
 
     private fun getModuleInputStream(): InputStream {
         return FabricLoader.getInstance().getModContainer("pirate-radio").flatMap { it.findPath("flite.wasm") }
-            .map<InputStream?> { it.toFile().inputStream() }.orElseGet {
+            .map { it.inputStream() }.orElseGet {
                 this.javaClass.getResourceAsStream("/flite.wasm")
             }
     }
diff --git a/src/client/kotlin/space/autistic/radio/client/fmsim/FastModulatedNoise.kt b/src/client/kotlin/space/autistic/radio/client/fmsim/FastModulatedNoise.kt
new file mode 100644
index 0000000..9639a38
--- /dev/null
+++ b/src/client/kotlin/space/autistic/radio/client/fmsim/FastModulatedNoise.kt
@@ -0,0 +1,86 @@
+package space.autistic.radio.client.fmsim
+
+import org.joml.Vector2f
+import space.autistic.radio.client.complex.cmul
+import java.nio.FloatBuffer
+import java.util.concurrent.ThreadLocalRandom
+import java.util.function.Consumer
+
+// FIXME use more realistic model
+class FastModulatedNoise(which: Which) {
+
+    private val buffer = when (which) {
+        Which.BASE -> FloatBuffer.wrap(baseNoise)
+        Which.UPPER -> FloatBuffer.wrap(upperNoise)
+        Which.LOWER -> FloatBuffer.wrap(upperNoise)
+    }
+    private val flipSpectrum = which == Which.LOWER
+    private val outBuffer = FloatBuffer.allocate(2 * FmFullConstants.FFT_DATA_BLOCK_SIZE_48K_300K)
+
+    // complex noise, in IQ format
+    fun generateNoise(power: Float, consumer: Consumer<FloatBuffer>) {
+        outBuffer.clear()
+        while (outBuffer.hasRemaining()) {
+            if (!buffer.hasRemaining()) {
+                buffer.clear()
+            }
+            if (flipSpectrum) {
+                outBuffer.put(buffer.get() * power)
+                outBuffer.put(-buffer.get() * power)
+            } else {
+                outBuffer.put(buffer.get() * power)
+                outBuffer.put(buffer.get() * power)
+            }
+        }
+        outBuffer.clear()
+        consumer.accept(outBuffer)
+    }
+
+    enum class Which {
+        LOWER, BASE, UPPER
+    }
+
+    companion object {
+        // 1 second
+        private val baseNoise = FloatArray(300000 * 2)
+        private val upperNoise = FloatArray(300000 * 2)
+
+        init {
+            val fmsim = FmFullModulator()
+            val buffer = FloatBuffer.wrap(baseNoise)
+            val input = FloatBuffer.allocate(FmFullConstants.FFT_DATA_BLOCK_SIZE_LPF_48K_15K_3K1 * 2)
+            val random = ThreadLocalRandom.current()
+            while (buffer.hasRemaining()) {
+                input.clear()
+                while (input.hasRemaining()) {
+                    val sample = random.nextFloat(1f)
+                    input.put(sample)
+                    input.put(sample)
+                }
+                input.clear()
+                fmsim.process(input, 1f, false) {
+                    if (buffer.remaining() < it.remaining()) {
+                        it.limit(it.position() + buffer.remaining())
+                    }
+                    buffer.put(it)
+                }
+            }
+            buffer.clear()
+            val plus100k = FloatBuffer.wrap(FmFullConstants.CBUFFER_100K_300K)
+            val z = Vector2f()
+            val w = Vector2f()
+            for (i in baseNoise.indices step 2) {
+                z.x = baseNoise[i]
+                z.y = baseNoise[i + 1]
+                if (!plus100k.hasRemaining()) {
+                    plus100k.clear()
+                }
+                w.x = plus100k.get()
+                w.y = plus100k.get()
+                z.cmul(w)
+                upperNoise[i] = z.x
+                upperNoise[i] = z.y
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/client/kotlin/space/autistic/radio/client/fmsim/FmFullMixer.kt b/src/client/kotlin/space/autistic/radio/client/fmsim/FmFullMixer.kt
deleted file mode 100644
index 567d93f..0000000
--- a/src/client/kotlin/space/autistic/radio/client/fmsim/FmFullMixer.kt
+++ /dev/null
@@ -1,4 +0,0 @@
-package space.autistic.radio.client.fmsim
-
-class FmFullMixer {
-}
\ No newline at end of file
diff --git a/src/client/kotlin/space/autistic/radio/client/fmsim/FmFullThread.kt b/src/client/kotlin/space/autistic/radio/client/fmsim/FmFullThread.kt
new file mode 100644
index 0000000..bce7a72
--- /dev/null
+++ b/src/client/kotlin/space/autistic/radio/client/fmsim/FmFullThread.kt
@@ -0,0 +1,294 @@
+package space.autistic.radio.client.fmsim
+
+import net.minecraft.client.sound.SoundSystem
+import net.minecraft.util.math.MathHelper
+import org.joml.Vector2f
+import space.autistic.radio.PirateRadio
+import space.autistic.radio.client.PirateRadioClient
+import space.autistic.radio.client.complex.cmul
+import space.autistic.radio.client.sound.PirateRadioSoundInstance
+import space.autistic.radio.client.sound.ReceiverAudioStream
+import space.autistic.radio.client.util.LevenshteinDistance
+import java.nio.ByteBuffer
+import java.nio.ByteOrder
+import java.nio.FloatBuffer
+import java.util.UUID
+import java.util.concurrent.ArrayBlockingQueue
+import javax.sound.sampled.AudioSystem
+import javax.sound.sampled.LineUnavailableException
+import javax.sound.sampled.Mixer
+import kotlin.math.max
+
+object FmFullThread : Runnable {
+    class FmTask(
+        val trackedTransmitters: Map<UUID, PirateRadioSoundInstance.TrackedTransmitter>,
+        val noiseLevels: FloatArray,
+        val audioOutput: Mixer.Info,
+        val minecraftSoundDevice: String?,
+    )
+
+    // empty task, marker to shut off the thread
+    val EMPTY_TASK = FmTask(emptyMap(), FloatArray(3), PirateRadioClient.minecraftAudioDevice, null)
+
+    val trackedTransmitterQueue = ArrayBlockingQueue<FmTask>(8)
+
+    private class TtsModulator(
+        val buffer: FloatBuffer,
+        val modulator: FmFullModulator,
+        var power: Float,
+        var repeatTimeout: Int,
+        var mixingBuffer: FloatBuffer
+    )
+
+    // 3 seconds
+    private const val REPEAT_TIMEOUT = 8000 * 3
+
+    // default to 0.05s (1/20)
+    val bufferSize = System.getProperty("space.autistic.radio.buffer.size", "").toIntOrNull() ?: 2400
+
+    override fun run() {
+        var currentTask = EMPTY_TASK
+        val modulators = HashMap<UUID, TtsModulator>()
+        val mixingBuffers = Array(3) { FloatBuffer.allocate(FmFullConstants.FFT_DATA_BLOCK_SIZE_48K_300K * 2) }
+
+        val inputBuffer = FloatBuffer.allocate(FmFullConstants.FFT_DATA_BLOCK_SIZE_LPF_48K_15K_3K1 * 2)
+
+        val noiseGens = Array(3) { FastModulatedNoise(FastModulatedNoise.Which.entries[it]) }
+
+        // -120dB or so
+        val noiseFloor = NoiseFloor(1e-12f)
+
+        val plus100k = FloatBuffer.wrap(FmFullConstants.CBUFFER_100K_300K)
+        val minus100k = FloatBuffer.wrap(FmFullConstants.CBUFFER_100K_300K)
+
+        val demodulator = FmFullDemodulator()
+
+        // for native audio only
+        val outputBytes = ByteBuffer.allocate(bufferSize * 2 * 2).order(ByteOrder.LITTLE_ENDIAN)
+        var nativeAudio = if (ReceiverAudioStream.useNativeAudio) {
+            AudioSystem.getSourceDataLine(ReceiverAudioStream.format)
+                .apply { open(ReceiverAudioStream.format, FmFullThread.bufferSize * 2 * 2) }
+        } else {
+            null
+        }
+        var lastOutput = PirateRadioClient.audioDevice
+        var lastMinecraftSoundDevice: String? = null
+
+        try {
+            while (!Thread.interrupted()) {
+                currentTask = trackedTransmitterQueue.poll() ?: currentTask
+                if (currentTask === EMPTY_TASK) {
+                    Thread.onSpinWait()
+                    continue
+                }
+
+                val audioOutput = currentTask.audioOutput
+                if (lastOutput != audioOutput && audioOutput != PirateRadioClient.minecraftAudioDevice) {
+                    nativeAudio = when (audioOutput) {
+                        PirateRadioClient.systemDefaultAudioDevice -> {
+                            try {
+                                AudioSystem.getSourceDataLine(ReceiverAudioStream.format)
+                                    .apply { open(ReceiverAudioStream.format, FmFullThread.bufferSize * 2 * 2) }
+                            } catch (e: LineUnavailableException) {
+                                null
+                            }
+                        }
+
+                        PirateRadioClient.openAlAudioDevice -> {
+                            null
+                        }
+
+                        else -> {
+                            try {
+                                AudioSystem.getSourceDataLine(ReceiverAudioStream.format, audioOutput)
+                                    .apply { open(ReceiverAudioStream.format, FmFullThread.bufferSize * 2 * 2) }
+                            } catch (e: LineUnavailableException) {
+                                null
+                            }
+                        }
+                    }
+                }
+                if (audioOutput == PirateRadioClient.minecraftAudioDevice) {
+                    if (lastMinecraftSoundDevice != currentTask.minecraftSoundDevice || lastOutput != audioOutput) {
+                        lastMinecraftSoundDevice = currentTask.minecraftSoundDevice
+                        nativeAudio = if (lastMinecraftSoundDevice == "") {
+                            try {
+                                AudioSystem.getSourceDataLine(ReceiverAudioStream.format)
+                                    .apply { open(ReceiverAudioStream.format, FmFullThread.bufferSize * 2 * 2) }
+                            } catch (e: LineUnavailableException) {
+                                null
+                            }
+                        } else {
+                            val device = lastMinecraftSoundDevice!!.removePrefix(SoundSystem.OPENAL_SOFT_ON)
+                            try {
+                                AudioSystem.getSourceDataLine(
+                                    ReceiverAudioStream.format,
+                                    AudioSystem.getMixerInfo().filter {
+                                        AudioSystem.getMixer(it).sourceLineInfo.isNotEmpty()
+                                    }.map {
+                                        it to LevenshteinDistance.calculate(it.description, device)
+                                    }.minByOrNull { it.second }?.first
+                                ).apply { open(ReceiverAudioStream.format, FmFullThread.bufferSize * 2 * 2) }
+                            } catch (e: LineUnavailableException) {
+                                null
+                            }
+                        }
+                    }
+                }
+                lastOutput = audioOutput
+
+                modulators.keys.retainAll(currentTask.trackedTransmitters.keys)
+                currentTask.trackedTransmitters.forEach { (k, v) ->
+                    modulators.compute(k) { _, modulator ->
+                        if (modulator != null) {
+                            modulator.power = v.power
+                            modulator.mixingBuffer = mixingBuffers[v.frequencyOffset + 1]
+                            return@compute modulator
+                        }
+                        val audioData = v.audio.getNow(null)
+                        if (audioData != null) {
+                            val buf = FloatBuffer.wrap(audioData)
+                            var actualSampleOffset = Math.floorMod(v.sampleOffset, (buf.capacity() + REPEAT_TIMEOUT))
+                            var repeatTimeout = max(0, actualSampleOffset - buf.capacity())
+                            if (repeatTimeout > 0) {
+                                actualSampleOffset = 0
+                                repeatTimeout = REPEAT_TIMEOUT - repeatTimeout
+                            }
+                            if (actualSampleOffset == buf.capacity()) {
+                                actualSampleOffset = 0
+                                repeatTimeout = REPEAT_TIMEOUT
+                            }
+                            buf.position(actualSampleOffset)
+                            TtsModulator(
+                                buf, FmFullModulator(), v.power, repeatTimeout, mixingBuffers[v.frequencyOffset + 1]
+                            )
+                        } else {
+                            null
+                        }
+                    }
+                }
+
+                mixingBuffers.forEach {
+                    it.clear()
+                    while (it.hasRemaining()) it.put(0f)
+                    it.clear()
+                }
+
+                modulators.values.forEach {
+                    inputBuffer.clear()
+                    while (inputBuffer.hasRemaining()) {
+                        val sample = if (it.repeatTimeout > 0) {
+                            it.repeatTimeout--
+                            0f
+                        } else {
+                            it.buffer.get()
+                        }
+                        if (!it.buffer.hasRemaining()) {
+                            it.repeatTimeout = REPEAT_TIMEOUT
+                            it.buffer.clear()
+                        }
+                        for (i in 0 until 2 * 6) inputBuffer.put(sample)
+                    }
+                    inputBuffer.clear()
+                    val mixingBuffer = it.mixingBuffer
+                    it.modulator.process(inputBuffer, it.power, false) { outputBuffer ->
+                        for (i in 0 until mixingBuffer.capacity()) {
+                            mixingBuffer.put(i, mixingBuffer.get(i) + outputBuffer.get())
+                        }
+                    }
+                }
+
+                if (modulators.any { it.value.mixingBuffer === mixingBuffers[2] }) {
+                    val floatBufferHi = mixingBuffers[2]
+                    val floatView = mixingBuffers[1]
+                    val z = Vector2f()
+                    val w = Vector2f()
+                    for (i in 0 until floatBufferHi.capacity() step 2) {
+                        z.x = floatBufferHi.get(i)
+                        z.y = floatBufferHi.get(i + 1)
+                        if (!plus100k.hasRemaining()) {
+                            plus100k.clear()
+                        }
+                        w.x = plus100k.get()
+                        w.y = plus100k.get()
+                        z.cmul(w)
+                        floatView.put(i, floatView.get(i) + z.x)
+                        floatView.put(i + 1, floatView.get(i + 1) + z.y)
+                    }
+                }
+
+                if (modulators.any { it.value.mixingBuffer === mixingBuffers[0] }) {
+                    val floatBufferLo = mixingBuffers[0]
+                    val floatView = mixingBuffers[1]
+                    val z = Vector2f()
+                    val w = Vector2f()
+                    for (i in 0 until floatBufferLo.capacity() step 2) {
+                        z.x = floatBufferLo.get(i)
+                        z.y = floatBufferLo.get(i + 1)
+                        if (!minus100k.hasRemaining()) {
+                            minus100k.clear()
+                        }
+                        w.x = minus100k.get()
+                        w.y = -minus100k.get()
+                        z.cmul(w)
+                        floatView.put(i, floatView.get(i) + z.x)
+                        floatView.put(i + 1, floatView.get(i + 1) + z.y)
+                    }
+                }
+
+                noiseGens.forEachIndexed { index, v ->
+                    if (currentTask.noiseLevels[index] != 0f) {
+                        v.generateNoise(currentTask.noiseLevels[index]) { outputBuffer ->
+                            val mixingBuffer = mixingBuffers[1]
+                            for (i in 0 until mixingBuffer.capacity()) {
+                                mixingBuffer.put(i, mixingBuffer.get(i) + outputBuffer.get())
+                            }
+                        }
+                    }
+                }
+
+                noiseFloor.noiseBlock { outputBuffer ->
+                    val mixingBuffer = mixingBuffers[1]
+                    for (i in 0 until mixingBuffer.capacity()) {
+                        mixingBuffer.put(i, mixingBuffer.get(i) + outputBuffer.get())
+                    }
+                }
+
+                @Suppress("NAME_SHADOWING")
+                val nativeAudio = nativeAudio
+                demodulator.process(mixingBuffers[1], PirateRadioClient.stereo) { _, audioBuffer ->
+                    // TODO stereo pilot
+                    // we *want* backpressure
+                    // FIXME use bigger buffers?
+                    if (nativeAudio != null) {
+                        while (audioBuffer.hasRemaining()) {
+                            if (!outputBytes.hasRemaining()) {
+                                val written = nativeAudio.write(outputBytes.array(), 0, outputBytes.capacity())
+                                outputBytes.position(written).compact()
+                                if (written == 0) {
+                                    nativeAudio.start()
+                                    continue
+                                }
+                            }
+                            val volume = PirateRadioClient.volume
+                            outputBytes.putShort(
+                                (MathHelper.clamp(
+                                    (audioBuffer.get() * 32767.5f - 0.5f).toInt(), -32768, 32767
+                                ) * volume * volume / 100).toShort()
+                            )
+                        }
+                    } else {
+                        ReceiverAudioStream.bufferQueue.put(
+                            FloatBuffer.allocate(audioBuffer.capacity()).put(audioBuffer).clear()
+                        )
+                    }
+                }
+            }
+        } catch (e: Throwable) {
+            PirateRadio.logger.error("Quitting FM simulation thread, as something went wrong!", e)
+            // for some reason it doesn't print stack trace but we still wanna propagate the exception to the thread
+            // itself
+            throw e
+        }
+    }
+}
diff --git a/src/client/kotlin/space/autistic/radio/client/fmsim/NoiseFloor.kt b/src/client/kotlin/space/autistic/radio/client/fmsim/NoiseFloor.kt
new file mode 100644
index 0000000..92df212
--- /dev/null
+++ b/src/client/kotlin/space/autistic/radio/client/fmsim/NoiseFloor.kt
@@ -0,0 +1,31 @@
+package space.autistic.radio.client.fmsim
+
+import java.nio.FloatBuffer
+import java.util.concurrent.ThreadLocalRandom
+import java.util.function.Consumer
+
+class NoiseFloor(level: Float) {
+    private val buffer = FloatBuffer.allocate(300000 * 2)
+    private val outputBuffer = FloatBuffer.allocate(FmFullConstants.FFT_DATA_BLOCK_SIZE_48K_300K * 2)
+
+    init {
+        // FIXME is this how you generate IQ noise?
+        val random = ThreadLocalRandom.current()
+        val dLevel = level.toDouble()
+        while (buffer.hasRemaining()) {
+            buffer.put(random.nextGaussian(0.0, dLevel).toFloat())
+            buffer.put(0f)
+        }
+    }
+
+    // complex noise, in IQ format?
+    fun noiseBlock(consumer: Consumer<FloatBuffer>) {
+        outputBuffer.clear()
+        while (outputBuffer.hasRemaining()) {
+            if (!buffer.hasRemaining()) buffer.clear()
+            outputBuffer.put(buffer.get())
+        }
+        outputBuffer.clear()
+        consumer.accept(outputBuffer)
+    }
+}
\ No newline at end of file
diff --git a/src/client/kotlin/space/autistic/radio/client/gui/FmReceiverScreen.kt b/src/client/kotlin/space/autistic/radio/client/gui/FmReceiverScreen.kt
index f5fd729..e4ea8ea 100644
--- a/src/client/kotlin/space/autistic/radio/client/gui/FmReceiverScreen.kt
+++ b/src/client/kotlin/space/autistic/radio/client/gui/FmReceiverScreen.kt
@@ -14,6 +14,7 @@ import net.minecraft.client.gui.DrawContext
 import net.minecraft.client.gui.screen.Screen
 import net.minecraft.client.gui.widget.ButtonWidget
 import net.minecraft.client.gui.widget.ClickableWidget
+import net.minecraft.client.gui.widget.CyclingButtonWidget
 import net.minecraft.client.render.GameRenderer
 import net.minecraft.client.util.InputUtil
 import net.minecraft.text.StringVisitable
@@ -29,6 +30,10 @@ import space.autistic.radio.client.PirateRadioClient
 import space.autistic.radio.client.fmsim.FmSimulatorMode
 import space.autistic.radio.wasm.Bindings.Companion.bindFunc
 import java.lang.invoke.MethodHandles
+import java.util.*
+import javax.sound.sampled.AudioSystem
+import javax.sound.sampled.Mixer
+import kotlin.collections.ArrayList
 import kotlin.math.max
 import kotlin.reflect.jvm.javaMethod
 
@@ -55,8 +60,9 @@ class FmReceiverScreen : Screen(Text.translatable("pirate-radio.fm-receiver")) {
     private var textObjectsFree = ArrayList<Int>()
 
     private val frequencyPlusWidget = ButtonWidget.builder(Text.translatable("pirate-radio.frequency.plus")) {
-        if (InputUtil.isKeyPressed(MinecraftClient.getInstance().window.handle, GLFW.GLFW_KEY_LEFT_SHIFT)
-            || InputUtil.isKeyPressed(MinecraftClient.getInstance().window.handle, GLFW.GLFW_KEY_RIGHT_SHIFT)
+        if (InputUtil.isKeyPressed(
+                MinecraftClient.getInstance().window.handle, GLFW.GLFW_KEY_LEFT_SHIFT
+            ) || InputUtil.isKeyPressed(MinecraftClient.getInstance().window.handle, GLFW.GLFW_KEY_RIGHT_SHIFT)
         ) {
             PirateRadioClient.frequency += 10
         } else {
@@ -66,8 +72,9 @@ class FmReceiverScreen : Screen(Text.translatable("pirate-radio.fm-receiver")) {
         .narrationSupplier { ButtonWidget.getNarrationMessage(Text.translatable("pirate-radio.frequency.plus.narrated")) }
         .build()
     private val frequencyMinusWidget = ButtonWidget.builder(Text.translatable("pirate-radio.frequency.minus")) {
-        if (InputUtil.isKeyPressed(MinecraftClient.getInstance().window.handle, GLFW.GLFW_KEY_LEFT_SHIFT)
-            || InputUtil.isKeyPressed(MinecraftClient.getInstance().window.handle, GLFW.GLFW_KEY_RIGHT_SHIFT)
+        if (InputUtil.isKeyPressed(
+                MinecraftClient.getInstance().window.handle, GLFW.GLFW_KEY_LEFT_SHIFT
+            ) || InputUtil.isKeyPressed(MinecraftClient.getInstance().window.handle, GLFW.GLFW_KEY_RIGHT_SHIFT)
         ) {
             PirateRadioClient.frequency -= 10
         } else {
@@ -93,6 +100,28 @@ class FmReceiverScreen : Screen(Text.translatable("pirate-radio.fm-receiver")) {
             else -> FmSimulatorMode.FULL
         }
     }.position(0, 40).build()
+    private val audioDevice = CyclingButtonWidget.builder { info: Mixer.Info ->
+        when (info) {
+            PirateRadioClient.minecraftAudioDevice -> Text.translatable("pirate-radio.device.system-matching-minecraft")
+            PirateRadioClient.systemDefaultAudioDevice -> Text.translatable("pirate-radio.device.system")
+            PirateRadioClient.openAlAudioDevice -> Text.translatable("pirate-radio.device.openal")
+            else -> Text.literal(info.description)
+        }
+    }.values(
+        listOf(
+            PirateRadioClient.minecraftAudioDevice,
+            PirateRadioClient.systemDefaultAudioDevice,
+            PirateRadioClient.openAlAudioDevice,
+        ), AudioSystem.getMixerInfo().filter {
+            AudioSystem.getMixer(it).sourceLineInfo.isNotEmpty()
+        }).initially(PirateRadioClient.audioDevice)
+        .build(0, 60, 320, 20, Text.translatable("pirate-radio.device.choose")) { _, it ->
+            PirateRadioClient.audioDevice = it
+        }
+
+    private val buttons = arrayOf(
+        frequencyPlusWidget, frequencyMinusWidget, volumePlusWidget, volumeMinusWidget, toggleModes, audioDevice
+    )
 
     override fun init() {
         if (failure == null && instance == null) {
@@ -111,7 +140,7 @@ class FmReceiverScreen : Screen(Text.translatable("pirate-radio.fm-receiver")) {
                 addDrawableChild(volumePlusWidget)
                 addDrawableChild(volumeMinusWidget)
                 addDrawableChild(toggleModes)
-                volumePlusWidget.visible
+                addDrawableChild(audioDevice)
             } catch (e: ChicoryException) {
                 failure = WasmScreenException("Skin failed to initialize", e)
                 logger.error("Failed to initialize.", failure)
@@ -287,6 +316,18 @@ class FmReceiverScreen : Screen(Text.translatable("pirate-radio.fm-receiver")) {
         toggleModes.height = height
     }
 
+    private fun audioDeviceWidgetDimensions(x: Int, y: Int, width: Int, height: Int) {
+        audioDevice.setDimensionsAndPosition(width, height, x, y)
+    }
+
+    private fun buttonsDimensions(index: Int, x: Int, y: Int, width: Int, height: Int): Boolean {
+        if (index < 0 || index >= buttons.size) {
+            return false
+        }
+        buttons[index].setDimensionsAndPosition(width, height, x, y)
+        return true
+    }
+
     private fun getFrequency(): Int = PirateRadioClient.frequency
 
     private fun getMode(): Int = PirateRadioClient.mode.ordinal
@@ -303,31 +344,14 @@ class FmReceiverScreen : Screen(Text.translatable("pirate-radio.fm-receiver")) {
 
     // useful for drawing the stereo pilot, not that it's implemented
     private fun drawImage(
-        red: Float,
-        green: Float,
-        blue: Float,
-        alpha: Float,
-        x: Int,
-        y: Int,
-        u: Float,
-        v: Float,
-        w: Int,
-        h: Int
+        red: Float, green: Float, blue: Float, alpha: Float, x: Int, y: Int, u: Float, v: Float, w: Int, h: Int
     ) {
         val drawContext = drawContext ?: throw WasmScreenException("Inappropriate draw call", null)
         RenderSystem.setShader(GameRenderer::getPositionTexProgram)
         RenderSystem.setShaderColor(red, green, blue, alpha)
         RenderSystem.setShaderTexture(0, TEXTURE)
         drawContext.drawTexture(
-            TEXTURE,
-            x,
-            y,
-            u,
-            v,
-            w,
-            h,
-            backgroundTextureWidth,
-            backgroundTextureHeight
+            TEXTURE, x, y, u, v, w, h, backgroundTextureWidth, backgroundTextureHeight
         )
         RenderSystem.setShaderColor(1f, 1f, 1f, 1f)
     }
@@ -444,6 +468,16 @@ class FmReceiverScreen : Screen(Text.translatable("pirate-radio.fm-receiver")) {
         )
         importValues.addFunction(
             bindFunc(
+                "audio-device-widget", "set-dimensions", lookup, this::audioDeviceWidgetDimensions.javaMethod!!, this
+            )
+        )
+        importValues.addFunction(
+            bindFunc(
+                "buttons", "set-dimensions", lookup, this::buttonsDimensions.javaMethod!!, this
+            )
+        )
+        importValues.addFunction(
+            bindFunc(
                 "simulator", "get-frequency", lookup, this::getFrequency.javaMethod!!, this
             )
         )
diff --git a/src/client/kotlin/space/autistic/radio/client/sound/PirateRadioSoundInstance.kt b/src/client/kotlin/space/autistic/radio/client/sound/PirateRadioSoundInstance.kt
index 4a4f087..435a488 100644
--- a/src/client/kotlin/space/autistic/radio/client/sound/PirateRadioSoundInstance.kt
+++ b/src/client/kotlin/space/autistic/radio/client/sound/PirateRadioSoundInstance.kt
@@ -1,5 +1,6 @@
 package space.autistic.radio.client.sound
 
+import com.dylibso.chicory.wasm.ChicoryException
 import net.fabricmc.fabric.api.client.sound.v1.FabricSoundInstance
 import net.minecraft.client.MinecraftClient
 import net.minecraft.client.network.ClientPlayerEntity
@@ -9,14 +10,30 @@ import net.minecraft.sound.SoundEvents
 import net.minecraft.util.Identifier
 import space.autistic.radio.PirateRadioEntityTypes
 import space.autistic.radio.client.PirateRadioClient
+import space.autistic.radio.client.flite.FliteWrapper
+import space.autistic.radio.client.fmsim.FmFullThread
+import space.autistic.radio.client.fmsim.FmFullThread.trackedTransmitterQueue
 import space.autistic.radio.client.fmsim.FmSimulatorMode
 import space.autistic.radio.entity.DisposableTransmitterEntity
+import space.autistic.radio.wasm.WasmExitException
+import java.lang.ref.WeakReference
+import java.nio.FloatBuffer
+import java.util.UUID
 import java.util.concurrent.CompletableFuture
 import kotlin.math.PI
 
 class PirateRadioSoundInstance(private val player: ClientPlayerEntity) : MovingSoundInstance(
     SoundEvents.INTENTIONALLY_EMPTY, SoundCategory.MUSIC, SoundInstance.createRandom()
 ) {
+    private val futuresCache = HashMap<String, WeakReference<CompletableFuture<FloatArray>>>()
+
+    class TrackedTransmitter(
+        val power: Float, val sampleOffset: Int, val audio: CompletableFuture<FloatArray>, val frequencyOffset: Int
+    ) {
+        override fun toString(): String {
+            return "TrackedTransmitter(power=$power, sampleOffset=$sampleOffset, audio=$audio, frequencyOffset=$frequencyOffset)"
+        }
+    }
 
     init {
         this.repeat = false
@@ -31,10 +48,11 @@ class PirateRadioSoundInstance(private val player: ClientPlayerEntity) : MovingS
             this.setDone()
             return
         }
+        // find relevant entities
         @Suppress("UNCHECKED_CAST") val trackedEntities: List<DisposableTransmitterEntity> =
             player.clientWorld.entities.filter { it.type == PirateRadioEntityTypes.DISPOSABLE_TRANSMITTER }
-                .filter { (it as DisposableTransmitterEntity).frequency <= PirateRadioClient.frequency + 1 && it.frequency >= PirateRadioClient.frequency - 1 }
-                .sortedByDescending { player.pos.squaredDistanceTo(it.pos) } as List<DisposableTransmitterEntity>
+                .filter { (it as DisposableTransmitterEntity).frequency <= PirateRadioClient.frequency + 1 && it.frequency >= PirateRadioClient.frequency - 1 && it.text.isNotEmpty() }
+                .sortedBy { player.pos.squaredDistanceTo(it.pos) } as List<DisposableTransmitterEntity>
         val main = trackedEntities.filter { it.frequency == PirateRadioClient.frequency }
             .take(if (PirateRadioClient.mode == FmSimulatorMode.FAST) 1 else 2)
         val lower = trackedEntities.filter { it.frequency == PirateRadioClient.frequency - 1 }
@@ -53,10 +71,52 @@ class PirateRadioSoundInstance(private val player: ClientPlayerEntity) : MovingS
             .fold(0f) { noise, entity ->
                 noise + getPowerReceived(entity.pos.squaredDistanceTo(player.pos))
             }
-        val mainLevels = main.map { getPowerReceived(it.pos.squaredDistanceTo(player.pos)) }
-        val lowerLevels = lower.map { getPowerReceived(it.pos.squaredDistanceTo(player.pos)) }
-        val upperLevels = upper.map { getPowerReceived(it.pos.squaredDistanceTo(player.pos)) }
-        // TODO
+        // updated tracked transmitters
+        val trackedTransmitters: MutableMap<UUID, TrackedTransmitter> = HashMap()
+        listOf(lower, main, upper).flatten().associateTo(trackedTransmitters) {
+            val text = it.text
+            val audio = futuresCache[text]?.get() ?: CompletableFuture.supplyAsync {
+                try {
+                    lateinit var buffer: FloatBuffer
+                    FliteWrapper.textToWave(text) {
+                        buffer = FloatBuffer.allocate(it.capacity())
+                        while (it.hasRemaining()) {
+                            val sample = (it.get().toFloat() + 0.5f) / 32767.5f
+                            buffer.put(sample)
+                        }
+                    }
+                    buffer.array()
+                } catch (e: ChicoryException) {
+                    floatArrayOf()
+                } catch (e: WasmExitException) {
+                    floatArrayOf()
+                }
+            }
+            futuresCache[text] = WeakReference(audio)
+            it.uuid to TrackedTransmitter(
+                getPowerReceived(it.pos.squaredDistanceTo(player.pos)),
+                it.age * (8000 / 20),
+                audio,
+                it.frequency - PirateRadioClient.frequency
+            )
+        }
+
+
+        val audioOutput = PirateRadioClient.audioDevice
+        val minecraftSoundDevice = if (audioOutput === PirateRadioClient.minecraftAudioDevice) {
+            MinecraftClient.getInstance().options.soundDevice.value
+        } else {
+            null
+        }
+
+        // this can be empty but it is not EMPTY_TASK
+        trackedTransmitterQueue.offer(
+            FmFullThread.FmTask(
+                trackedTransmitters, floatArrayOf(lowerNoise, mainNoise, upperNoise), audioOutput, minecraftSoundDevice
+            )
+        )
+        volume = PirateRadioClient.volume.toFloat() / 10
+        volume *= volume
     }
 
     private fun getPowerReceived(rsq: Double): Float {
diff --git a/src/client/kotlin/space/autistic/radio/client/sound/ReceiverAudioStream.kt b/src/client/kotlin/space/autistic/radio/client/sound/ReceiverAudioStream.kt
index 5ca802b..34d5585 100644
--- a/src/client/kotlin/space/autistic/radio/client/sound/ReceiverAudioStream.kt
+++ b/src/client/kotlin/space/autistic/radio/client/sound/ReceiverAudioStream.kt
@@ -1,34 +1,45 @@
 package space.autistic.radio.client.sound
 
 import it.unimi.dsi.fastutil.floats.FloatConsumer
-import net.minecraft.client.sound.AudioStream
-import net.minecraft.client.sound.ChannelList
-import java.nio.ByteBuffer
+import net.minecraft.client.sound.BufferedAudioStream
+import space.autistic.radio.client.fmsim.FmFullConstants
+import space.autistic.radio.client.fmsim.FmFullThread
+import space.autistic.radio.client.fmsim.FmFullThread.trackedTransmitterQueue
+import java.nio.FloatBuffer
+import java.util.Properties
+import java.util.concurrent.ArrayBlockingQueue
 import javax.sound.sampled.AudioFormat
+import kotlin.math.max
 
-object ReceiverAudioStream : AudioStream {
+object ReceiverAudioStream : BufferedAudioStream {
     private val format = AudioFormat(48000f, 16, 2, true, false)
 
+    val bufferQueue = ArrayBlockingQueue<FloatBuffer>(
+        max(
+            0,
+            System.getProperty("space.autistic.radio.buffers", "").toIntOrNull() ?: 250
+        )
+    )
+
+    val useNativeAudio = System.getProperty("space.autistic.radio.output", "native") == "native"
+
+    private val skipBuffer = FloatBuffer.allocate(FmFullConstants.FFT_DATA_BLOCK_SIZE_LPF_48K_15K_3K1 * 2)
+        get() = field.clear()
+
     override fun close() {
-        // TODO, nop for now, should stop the processing
+        trackedTransmitterQueue.clear()
+        trackedTransmitterQueue.offer(FmFullThread.EMPTY_TASK)
     }
 
     override fun getFormat(): AudioFormat {
         return format
     }
 
-    override fun read(size: Int): ByteBuffer {
-        val channelList = ChannelList(size + 8192)
-
-        while (this.read(channelList) && channelList.currentBufferSize < size) {
+    override fun read(channelList: FloatConsumer): Boolean {
+        val buffer = bufferQueue.poll() ?: skipBuffer
+        while (buffer.hasRemaining()) {
+            channelList.accept(buffer.get())
         }
-
-        return channelList.buffer
-    }
-
-    private fun read(channelList: FloatConsumer): Boolean {
-        channelList.accept(0f)
-        channelList.accept(0f)
         return true
     }
 }
\ No newline at end of file
diff --git a/src/client/kotlin/space/autistic/radio/client/util/LevenshteinDistance.kt b/src/client/kotlin/space/autistic/radio/client/util/LevenshteinDistance.kt
new file mode 100644
index 0000000..6f04ce1
--- /dev/null
+++ b/src/client/kotlin/space/autistic/radio/client/util/LevenshteinDistance.kt
@@ -0,0 +1,54 @@
+//The MIT License (MIT)
+//
+//Copyright (c) 2024
+//
+//Permission is hereby granted, free of charge, to any person obtaining a copy
+//of this software and associated documentation files (the "Software"), to deal
+//in the Software without restriction, including without limitation the rights
+//to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//copies of the Software, and to permit persons to whom the Software is
+//furnished to do so, subject to the following conditions:
+//
+//The above copyright notice and this permission notice shall be included in
+//all copies or substantial portions of the Software.
+//
+//THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//THE SOFTWARE.
+
+package space.autistic.radio.client.util
+
+// taken from https://github.com/Volcano-Bay-Studios/pavlovian-dogs/blob/master/src%2Fmain%2Fjava%2Fxyz%2Fvolcanobay%2Fpavloviandogs%2Futil%2FLevenshteinDistance.java
+object LevenshteinDistance {
+    fun calculate(x: String, y: String): Int {
+        val dp = Array(x.length + 1) { IntArray(y.length + 1) }
+
+        for (i in 0..x.length) {
+            for (j in 0..y.length) {
+                if (i == 0) {
+                    dp[i][j] = j
+                } else if (j == 0) {
+                    dp[i][j] = i
+                } else {
+                    dp[i][j] = min(
+                        dp[i - 1][j - 1] + costOfSubstitution(x[i - 1], y[j - 1]), dp[i - 1][j] + 1, dp[i][j - 1] + 1
+                    )
+                }
+            }
+        }
+
+        return dp[x.length][y.length]
+    }
+
+    private fun costOfSubstitution(a: Char, b: Char): Int {
+        return if (a == b) 0 else 1
+    }
+
+    private fun min(vararg numbers: Int): Int {
+        return numbers.minOrNull() ?: Int.MAX_VALUE
+    }
+}
\ No newline at end of file
diff --git a/src/client/resources/pirate-radio.client-mixins.json b/src/client/resources/pirate-radio.client-mixins.json
new file mode 100644
index 0000000..27a5861
--- /dev/null
+++ b/src/client/resources/pirate-radio.client-mixins.json
@@ -0,0 +1,14 @@
+{
+  "required": true,
+  "minVersion": "0.8",
+  "package": "space.autistic.radio.client.mixin",
+  "compatibilityLevel": "JAVA_21",
+  "mixins": [
+  ],
+  "client": [
+    "BlockStatesLoaderMixin"
+  ],
+  "injectors": {
+    "defaultRequire": 1
+  }
+}
\ No newline at end of file