convolver crossfeed; filter debug code moved to the classes

2026-03-07 12:21:52 +09:00 · 2023-12-21 17:00:23 +09:00
parent 64ef0343b9
commit fefdf44e3e
15 changed files with 299 additions and 182 deletions
--- a/src/net/torvald/terrarum/audio/AudioMixer.kt
+++ b/src/net/torvald/terrarum/audio/AudioMixer.kt
@@ -184,11 +184,11 @@ object AudioMixer: Disposable {
            it.addSidechainInput(sfxSumBus, 1.0)
        }

-        convolveBusOpen.filters[1] = Convolv(ModMgr.getFile("basegame", "audio/convolution/EchoThief - PurgatoryChasm.bin"))
+        convolveBusOpen.filters[1] = Convolv(ModMgr.getFile("basegame", "audio/convolution/EchoThief - PurgatoryChasm.bin"), decibelsToFullscale(-6.0).toFloat())
        convolveBusOpen.filters[2] = Gain(decibelsToFullscale(17.0).toFloat()) // don't make it too loud; it'll sound like a shit
        convolveBusOpen.volume = 0.5 // will be controlled by the other updater which surveys the world

-        convolveBusCave.filters[1] = Convolv(ModMgr.getFile("basegame", "audio/convolution/EchoThief - WaterplacePark-trimmed.bin"))
+        convolveBusCave.filters[1] = Convolv(ModMgr.getFile("basegame", "audio/convolution/EchoThief - WaterplacePark-trimmed.bin"), decibelsToFullscale(-3.0).toFloat())
        convolveBusCave.filters[2] = Gain(decibelsToFullscale(16.0).toFloat())
        convolveBusCave.volume = 0.5 // will be controlled by the other updater which surveys the world

--- a/src/net/torvald/terrarum/audio/dsp/BinoPan.kt
+++ b/src/net/torvald/terrarum/audio/dsp/BinoPan.kt
@@ -1,10 +1,20 @@
 package net.torvald.terrarum.audio.dsp

+import com.badlogic.gdx.graphics.g2d.SpriteBatch
 import com.jme3.math.FastMath
+import net.torvald.terrarum.App
 import net.torvald.terrarum.audio.AudioMixer
 import net.torvald.terrarum.audio.TerrarumAudioMixerTrack
 import net.torvald.terrarum.audio.decibelsToFullscale
+import net.torvald.terrarum.ui.BasicDebugInfoWindow
+import net.torvald.terrarum.ui.BasicDebugInfoWindow.Companion.COL_METER_GRAD
+import net.torvald.terrarum.ui.BasicDebugInfoWindow.Companion.COL_METER_GRAD2
+import net.torvald.terrarum.ui.BasicDebugInfoWindow.Companion.FILTER_NAME_ACTIVE
+import net.torvald.terrarum.ui.BasicDebugInfoWindow.Companion.STRIP_W
+import net.torvald.terrarum.ui.BasicDebugInfoWindow.Companion.toIntAndFrac
+import net.torvald.terrarum.ui.Toolkit
 import kotlin.math.absoluteValue
+import kotlin.math.roundToInt

 /**
 * The input audio must be monaural
@@ -62,4 +72,22 @@ class BinoPan(var pan: Float, var earDist: Float = 0.18f): TerrarumAudioFilter()

        push(inbuf[0], delayLine)
    }
+
+    override fun drawDebugView(batch: SpriteBatch, x: Int, y: Int) {
+        val w = pan * 0.5f * STRIP_W
+        batch.color = COL_METER_GRAD2
+        Toolkit.fillArea(batch, x + STRIP_W / 2f, y.toFloat(), w, 14f)
+        batch.color = COL_METER_GRAD
+        Toolkit.fillArea(batch, x + STRIP_W / 2f, y+14f, w, 2f)
+
+        batch.color = FILTER_NAME_ACTIVE
+        val panLabel = if (pan == 0f) "<C>"
+        else if (pan < 0) "L${pan.absoluteValue.times(100).toIntAndFrac(3,1)}"
+        else "R${pan.absoluteValue.times(100).toIntAndFrac(3,1)}"
+        App.fontSmallNumbers.draw(batch, panLabel, x+3f, y+1f)
+
+        App.fontSmallNumbers.draw(batch, "AS:${AudioMixer.SPEED_OF_SOUND.roundToInt()}", x+3f, y+17f)
+    }
+
+    override val debugViewHeight = 32
 }
--- a/src/net/torvald/terrarum/audio/dsp/Bitcrush.kt
+++ b/src/net/torvald/terrarum/audio/dsp/Bitcrush.kt
@@ -1,7 +1,14 @@
 package net.torvald.terrarum.audio.dsp

+import com.badlogic.gdx.graphics.g2d.SpriteBatch
+import com.jme3.math.FastMath
+import net.torvald.terrarum.App
 import net.torvald.terrarum.audio.TerrarumAudioMixerTrack
+import net.torvald.terrarum.audio.linToLogPerc
 import net.torvald.terrarum.roundToFloat
+import net.torvald.terrarum.ui.BasicDebugInfoWindow
+import net.torvald.terrarum.ui.BasicDebugInfoWindow.Companion.toIntAndFrac
+import net.torvald.terrarum.ui.Toolkit

 class Bitcrush(var steps: Int, var inputGain: Float = 1f): TerrarumAudioFilter() {
    override fun thru(inbuf: List<FloatArray>, outbuf: List<FloatArray>) {
@@ -14,4 +21,19 @@ class Bitcrush(var steps: Int, var inputGain: Float = 1f): TerrarumAudioFilter()
            }
        }
    }
+
+    override fun drawDebugView(batch: SpriteBatch, x: Int, y: Int) {
+        val perc = linToLogPerc(steps.toDouble(), 2.0, 65536.0).toFloat()
+        batch.color = BasicDebugInfoWindow.COL_METER_GRAD2
+        Toolkit.fillArea(batch, x.toFloat(), y.toFloat(), BasicDebugInfoWindow.STRIP_W * perc, 14f)
+        batch.color = BasicDebugInfoWindow.COL_METER_GRAD
+        Toolkit.fillArea(batch, x.toFloat(), y+14f, BasicDebugInfoWindow.STRIP_W * perc, 2f)
+
+        val bits = FastMath.log(steps.toFloat(), 2f).toIntAndFrac(1,2)
+
+        batch.color = BasicDebugInfoWindow.FILTER_NAME_ACTIVE
+        App.fontSmallNumbers.draw(batch, "B:$bits", x+3f, y+1f)
+    }
+
+    override val debugViewHeight = 16
 }
--- a/src/net/torvald/terrarum/audio/dsp/Buffer.kt
+++ b/src/net/torvald/terrarum/audio/dsp/Buffer.kt
@@ -1,5 +1,10 @@
 package net.torvald.terrarum.audio.dsp

+import com.badlogic.gdx.graphics.g2d.SpriteBatch
+import net.torvald.terrarum.App
+import net.torvald.terrarum.audio.TerrarumAudioMixerTrack.Companion.AUDIO_BUFFER_SIZE
+import net.torvald.terrarum.ui.BasicDebugInfoWindow.Companion.FILTER_NAME_ACTIVE
+
 object Buffer : TerrarumAudioFilter() {
    init {
        bypass = true
@@ -8,4 +13,11 @@ object Buffer : TerrarumAudioFilter() {
    override fun thru(inbuf: List<FloatArray>, outbuf: List<FloatArray>) {
        bypass = true
    }
+
+    override fun drawDebugView(batch: SpriteBatch, x: Int, y: Int) {
+        batch.color = FILTER_NAME_ACTIVE
+        App.fontSmallNumbers.draw(batch, "Bs:${AUDIO_BUFFER_SIZE}", x+3f, y+1f)
+    }
+
+    override val debugViewHeight = 16
 }
--- a/src/net/torvald/terrarum/audio/dsp/Convolv.kt
+++ b/src/net/torvald/terrarum/audio/dsp/Convolv.kt
@@ -1,17 +1,34 @@
 package net.torvald.terrarum.audio.dsp

+import com.badlogic.gdx.graphics.g2d.SpriteBatch
 import com.jme3.math.FastMath
+import net.torvald.terrarum.App
 import net.torvald.terrarum.App.setDebugTime
 import net.torvald.terrarum.audio.*
 import net.torvald.terrarum.audio.TerrarumAudioMixerTrack.Companion.AUDIO_BUFFER_SIZE
+import net.torvald.terrarum.ui.BasicDebugInfoWindow
+import net.torvald.terrarum.ui.BasicDebugInfoWindow.Companion.COL_METER_GRAD
+import net.torvald.terrarum.ui.BasicDebugInfoWindow.Companion.COL_METER_GRAD2
+import net.torvald.terrarum.ui.BasicDebugInfoWindow.Companion.COL_METER_GRAD2_RED
+import net.torvald.terrarum.ui.BasicDebugInfoWindow.Companion.COL_METER_GRAD2_YELLOW
+import net.torvald.terrarum.ui.BasicDebugInfoWindow.Companion.COL_METER_GRAD_RED
+import net.torvald.terrarum.ui.BasicDebugInfoWindow.Companion.COL_METER_GRAD_YELLOW
+import net.torvald.terrarum.ui.BasicDebugInfoWindow.Companion.FILTER_NAME_ACTIVE
+import net.torvald.terrarum.ui.BasicDebugInfoWindow.Companion.STRIP_W
+import net.torvald.terrarum.ui.Toolkit
 import java.io.File
+import kotlin.math.roundToInt

-class Convolv(ir: File, val gain: Float = 1f / 512f): TerrarumAudioFilter() {
+/**
+ * @param ir Binary file containing MONO IR
+ * @param crossfeed The amount of channel crossfeeding to simulate the stereo ID
+ */
+class Convolv(ir: File, val crossfeed: Float, gain: Float = 1f / 256f): TerrarumAudioFilter() {
+    private val gain: Float = gain / (1f + crossfeed)

    val fftLen: Int
    private val convFFT: Array<ComplexArray>
-//    private val inbuf: Array<ComplexArray>
-    private val sumbuf: ComplexArray
+    private val sumbuf: Array<ComplexArray>

    private val BLOCKSIZE = TerrarumAudioMixerTrack.AUDIO_BUFFER_SIZE

@@ -31,8 +48,7 @@ class Convolv(ir: File, val gain: Float = 1f / 512f): TerrarumAudioFilter() {
        println("IR '${ir.path}' Sample Count = $sampleCount; FFT Length = $fftLen")

        val conv = Array(2) { FloatArray(fftLen) }
-//        inbuf = Array(2) { ComplexArray(FloatArray(fftLen * 2)) }
-        sumbuf = ComplexArray(FloatArray(fftLen * 2))
+        sumbuf = Array(2) { ComplexArray(FloatArray(fftLen * 2)) }

        ir.inputStream().let {
            for (i in 0 until sampleCount) {
@@ -93,8 +109,8 @@ class Convolv(ir: File, val gain: Float = 1f / 512f): TerrarumAudioFilter() {

        pushSum(gain, inbuf[0], inbuf[1], sumbuf)

-        convolve(sumbuf, convFFT[0], fftOutL)
-        convolve(sumbuf, convFFT[1], fftOutR)
+        convolve(sumbuf[0], convFFT[0], fftOutL)
+        convolve(sumbuf[1], convFFT[1], fftOutR)

        for (i in 0 until BLOCKSIZE) {
            outbuf[0][i] = fftOutL[fftLen - BLOCKSIZE + i]
@@ -109,7 +125,7 @@ class Convolv(ir: File, val gain: Float = 1f / 512f): TerrarumAudioFilter() {
    }


-    fun push(gain: Float, samples: FloatArray, buf: ComplexArray) {
+    private fun push(gain: Float, samples: FloatArray, buf: ComplexArray) {
        // shift numbers
        System.arraycopy(buf.reim, samples.size * 2, buf.reim, 0, buf.reim.size - samples.size * 2)
        // fill in the shifted area
@@ -120,15 +136,42 @@ class Convolv(ir: File, val gain: Float = 1f / 512f): TerrarumAudioFilter() {
        }
    }

-    fun pushSum(gain: Float, sampleL: FloatArray, sampleR: FloatArray, buf: ComplexArray) {
+    private fun pushSum(gain: Float, sampleL: FloatArray, sampleR: FloatArray, sumbuf: Array<ComplexArray>) {
        // shift numbers
-        System.arraycopy(buf.reim, sampleL.size * 2, buf.reim, 0, buf.reim.size - sampleL.size * 2)
+        System.arraycopy(sumbuf[0].reim, sampleL.size * 2, sumbuf[0].reim, 0, sumbuf[0].reim.size - sampleL.size * 2)
+        System.arraycopy(sumbuf[1].reim, sampleL.size * 2, sumbuf[1].reim, 0, sumbuf[1].reim.size - sampleL.size * 2)
        // fill in the shifted area
-        val baseI = buf.reim.size - sampleL.size * 2
+        val baseI = sumbuf[0].reim.size - sampleL.size * 2
        for (index in sampleL.indices) {
-            buf.reim[baseI + index * 2 + 0] = (sampleL[index] + sampleR[index]) * gain
-            buf.reim[baseI + index * 2 + 1] = 0f
+            sumbuf[0].reim[baseI + index * 2 + 0] = (sampleL[index] * 1.000000f + sampleR[index] * crossfeed) * gain
+            sumbuf[0].reim[baseI + index * 2 + 1] = 0f
+            sumbuf[1].reim[baseI + index * 2 + 0] = (sampleL[index] * crossfeed + sampleR[index] * 1.000000f) * gain
+            sumbuf[1].reim[baseI + index * 2 + 1] = 0f
        }
    }

+    override fun drawDebugView(batch: SpriteBatch, x: Int, y: Int) {
+    // processing speed bar
+        val w = processingSpeed
+        val perc = w.coerceAtMost(2f) / 2f
+        batch.color = if (w > 1.5f) COL_METER_GRAD2 else if (w > 1f) COL_METER_GRAD2_YELLOW else COL_METER_GRAD2_RED
+        Toolkit.fillArea(batch, x.toFloat(), y.toFloat(), STRIP_W * perc, 14f)
+        batch.color = if (w > 1.5f) COL_METER_GRAD else if (w > 1f) COL_METER_GRAD_YELLOW else COL_METER_GRAD_RED
+        Toolkit.fillArea(batch, x.toFloat(), y+14f, STRIP_W * perc, 2f)
+
+        // filter length bar
+        val g = FastMath.intLog2(AUDIO_BUFFER_SIZE)
+        val perc2 = (FastMath.intLog2(fftLen).minus(g).toFloat() / (16f - g)).coerceIn(0f, 1f)
+        batch.color = COL_METER_GRAD2
+        Toolkit.fillArea(batch, x.toFloat(), y + 16f, STRIP_W * perc2, 14f)
+        batch.color = COL_METER_GRAD
+        Toolkit.fillArea(batch, x.toFloat(), y + 16f+14f, STRIP_W * perc2, 2f)
+
+        // texts
+        batch.color = FILTER_NAME_ACTIVE
+        App.fontSmallNumbers.draw(batch, "P:${processingSpeed.times(100).roundToInt().div(100f)}x", x+3f, y+1f)
+        App.fontSmallNumbers.draw(batch, "L:${fftLen}", x+3f, y+17f)
+    }
+
+    override val debugViewHeight = 32
 }
--- a/src/net/torvald/terrarum/audio/dsp/Gain.kt
+++ b/src/net/torvald/terrarum/audio/dsp/Gain.kt
@@ -1,6 +1,11 @@
 package net.torvald.terrarum.audio.dsp

+import com.badlogic.gdx.graphics.g2d.SpriteBatch
+import net.torvald.terrarum.App
 import net.torvald.terrarum.audio.TerrarumAudioMixerTrack
+import net.torvald.terrarum.audio.fullscaleToDecibels
+import net.torvald.terrarum.ui.BasicDebugInfoWindow.Companion.FILTER_NAME_ACTIVE
+import kotlin.math.roundToInt

 class Gain(var gain: Float): TerrarumAudioFilter() {
    override fun thru(inbuf: List<FloatArray>, outbuf: List<FloatArray>) {
@@ -9,4 +14,11 @@ class Gain(var gain: Float): TerrarumAudioFilter() {
            outbuf[1][i] = inbuf[1][i] * gain
        }
    }
+
+    override fun drawDebugView(batch: SpriteBatch, x: Int, y: Int) {
+        batch.color = FILTER_NAME_ACTIVE
+        App.fontSmallNumbers.draw(batch, "G:${fullscaleToDecibels(gain.toDouble()).times(100).roundToInt().div(100f)}", x+3f, y+1f)
+    }
+
+    override val debugViewHeight = 16
 }
--- a/src/net/torvald/terrarum/audio/dsp/Highpass.kt
+++ b/src/net/torvald/terrarum/audio/dsp/Highpass.kt
@@ -1,7 +1,15 @@
 package net.torvald.terrarum.audio.dsp

+import com.badlogic.gdx.graphics.g2d.SpriteBatch
 import com.jme3.math.FastMath
+import net.torvald.terrarum.App
 import net.torvald.terrarum.audio.TerrarumAudioMixerTrack
+import net.torvald.terrarum.audio.linToLogPerc
+import net.torvald.terrarum.ui.BasicDebugInfoWindow.Companion.COL_METER_GRAD
+import net.torvald.terrarum.ui.BasicDebugInfoWindow.Companion.COL_METER_GRAD2
+import net.torvald.terrarum.ui.BasicDebugInfoWindow.Companion.FILTER_NAME_ACTIVE
+import net.torvald.terrarum.ui.BasicDebugInfoWindow.Companion.STRIP_W
+import net.torvald.terrarum.ui.Toolkit

 class Highpass(cutoff0: Float): TerrarumAudioFilter() {

@@ -47,4 +55,17 @@ class Highpass(cutoff0: Float): TerrarumAudioFilter() {
        }
    }

+    override fun drawDebugView(batch: SpriteBatch, x: Int, y: Int) {
+        val perc = 1f - linToLogPerc(cutoff, 2.0, 24000.0).toFloat()
+        batch.color = COL_METER_GRAD2
+        Toolkit.fillArea(batch, x.toFloat() + STRIP_W, y.toFloat(), -STRIP_W * perc, 14f)
+        batch.color = COL_METER_GRAD
+        Toolkit.fillArea(batch, x.toFloat() + STRIP_W, y+14f, -STRIP_W * perc, 2f)
+
+        batch.color = FILTER_NAME_ACTIVE
+        App.fontSmallNumbers.draw(batch, "F:${cutoff.toInt()}", x+3f, y+1f)
+    }
+
+    override val debugViewHeight = 16
+
 }
--- a/src/net/torvald/terrarum/audio/dsp/Lowpass.kt
+++ b/src/net/torvald/terrarum/audio/dsp/Lowpass.kt
@@ -1,7 +1,15 @@
 package net.torvald.terrarum.audio.dsp

+import com.badlogic.gdx.graphics.g2d.SpriteBatch
 import com.jme3.math.FastMath
+import net.torvald.terrarum.App
 import net.torvald.terrarum.audio.TerrarumAudioMixerTrack
+import net.torvald.terrarum.audio.linToLogPerc
+import net.torvald.terrarum.ui.BasicDebugInfoWindow
+import net.torvald.terrarum.ui.BasicDebugInfoWindow.Companion.COL_METER_GRAD
+import net.torvald.terrarum.ui.BasicDebugInfoWindow.Companion.COL_METER_GRAD2
+import net.torvald.terrarum.ui.BasicDebugInfoWindow.Companion.FILTER_NAME_ACTIVE
+import net.torvald.terrarum.ui.Toolkit

 class Lowpass(cutoff0: Float): TerrarumAudioFilter() {

@@ -47,4 +55,16 @@ class Lowpass(cutoff0: Float): TerrarumAudioFilter() {
        }
    }

+    override fun drawDebugView(batch: SpriteBatch, x: Int, y: Int) {
+        val perc = linToLogPerc(cutoff, 24.0, 24000.0).toFloat()
+        batch.color = COL_METER_GRAD2
+        Toolkit.fillArea(batch, x.toFloat(), y.toFloat(), BasicDebugInfoWindow.STRIP_W * perc, 14f)
+        batch.color = COL_METER_GRAD
+        Toolkit.fillArea(batch, x.toFloat(), y+14f, BasicDebugInfoWindow.STRIP_W * perc, 2f)
+
+        batch.color = FILTER_NAME_ACTIVE
+        App.fontSmallNumbers.draw(batch, "F:${cutoff.toInt()}", x+3f, y+1f)
+    }
+
+    override val debugViewHeight = 16
 }
--- a/src/net/torvald/terrarum/audio/dsp/NullFilter.kt
+++ b/src/net/torvald/terrarum/audio/dsp/NullFilter.kt
@@ -1,9 +1,16 @@
 package net.torvald.terrarum.audio.dsp

+import com.badlogic.gdx.graphics.g2d.SpriteBatch
+
 object NullFilter : TerrarumAudioFilter() {
    override fun thru(inbuf: List<FloatArray>, outbuf: List<FloatArray>) {
        outbuf.forEachIndexed { index, outTrack ->
            System.arraycopy(inbuf[index], 0, outTrack, 0, outTrack.size)
        }
    }
+
+    override fun drawDebugView(batch: SpriteBatch, x: Int, y: Int) {
+    }
+
+    override val debugViewHeight = 0
 }
--- a/src/net/torvald/terrarum/audio/dsp/Reverb.kt
+++ b/src/net/torvald/terrarum/audio/dsp/Reverb.kt
@@ -1,5 +1,6 @@
 package net.torvald.terrarum.audio.dsp

+import com.badlogic.gdx.graphics.g2d.SpriteBatch
 import com.jme3.math.FastMath
 import net.torvald.terrarum.audio.TerrarumAudioMixerTrack
 import kotlin.math.roundToInt
@@ -46,4 +47,9 @@ class Reverb(val delayMS: Float = 36f, var feedback: Float = 0.92f, var lowpass:
            }
        }
    }
+
+    override fun drawDebugView(batch: SpriteBatch, x: Int, y: Int) {
+    }
+
+    override val debugViewHeight = 0
 }
--- a/src/net/torvald/terrarum/audio/dsp/Scope.kt
+++ b/src/net/torvald/terrarum/audio/dsp/Scope.kt
@@ -1,6 +1,10 @@
 package net.torvald.terrarum.audio.dsp

+import com.badlogic.gdx.graphics.Color
+import com.badlogic.gdx.graphics.g2d.SpriteBatch
 import net.torvald.terrarum.audio.TerrarumAudioMixerTrack
+import net.torvald.terrarum.ui.BasicDebugInfoWindow.Companion.STRIP_W
+import net.torvald.terrarum.ui.Toolkit
 import kotlin.math.roundToInt

 class Scope : TerrarumAudioFilter() {
@@ -37,4 +41,26 @@ class Scope : TerrarumAudioFilter() {
            System.arraycopy(inbuf[index], 0, outTrack, 0, outTrack.size)
        }
    }
+
+    private val halfStripW = STRIP_W / 2
+    private val scopePlotCol = Color(0x61b3df_33)
+
+    override fun drawDebugView(batch: SpriteBatch, x: Int, y: Int) {
+        batch.color = scopePlotCol
+        val xxs = backbufR
+        val yys = backbufL
+        for (t in xxs.lastIndex downTo 0) {
+            val xs = xxs[t]
+            val ys = yys[t]
+
+            for (i in xs.indices.reversed()) {
+                val px = xs[i] * halfStripW + halfStripW
+                val py = ys[i] * halfStripW + halfStripW
+                Toolkit.fillArea(batch, x + px, y + py, 1f, 1f)
+            }
+
+        }
+    }
+
+    override val debugViewHeight = STRIP_W
 }
--- a/src/net/torvald/terrarum/audio/dsp/SoftClp.kt
+++ b/src/net/torvald/terrarum/audio/dsp/SoftClp.kt
@@ -1,5 +1,6 @@
 package net.torvald.terrarum.audio.dsp

+import com.badlogic.gdx.graphics.g2d.SpriteBatch
 import kotlin.math.absoluteValue
 import kotlin.math.tanh

@@ -25,4 +26,9 @@ object SoftClp : TerrarumAudioFilter() {
            }
        }
    }
+
+    override fun drawDebugView(batch: SpriteBatch, x: Int, y: Int) {
+    }
+
+    override val debugViewHeight = 0
 }
--- a/src/net/torvald/terrarum/audio/dsp/TerrarumAudioFilter.kt
+++ b/src/net/torvald/terrarum/audio/dsp/TerrarumAudioFilter.kt
@@ -1,5 +1,7 @@
 package net.torvald.terrarum.audio.dsp

+import com.badlogic.gdx.graphics.g2d.SpriteBatch
+
 abstract class TerrarumAudioFilter {
    var bypass = false
    protected abstract fun thru(inbuf: List<FloatArray>, outbuf: List<FloatArray>)
@@ -11,6 +13,8 @@ abstract class TerrarumAudioFilter {
        }
        else thru(inbuf, outbuf)
    }
+    abstract fun drawDebugView(batch: SpriteBatch, x: Int, y: Int)
+    abstract val debugViewHeight: Int
 }

 fun FloatArray.applyGain(gain: Float = 1f) = this.map { it * gain }.toFloatArray()
--- a/src/net/torvald/terrarum/audio/dsp/XYtoMS.kt
+++ b/src/net/torvald/terrarum/audio/dsp/XYtoMS.kt
@@ -1,5 +1,6 @@
 package net.torvald.terrarum.audio.dsp

+import com.badlogic.gdx.graphics.g2d.SpriteBatch
 import net.torvald.terrarum.audio.TerrarumAudioMixerTrack

 object XYtoMS: TerrarumAudioFilter() {
@@ -13,6 +14,11 @@ object XYtoMS: TerrarumAudioFilter() {
            outbuf[1][i] = S
        }
    }
+
+    override fun drawDebugView(batch: SpriteBatch, x: Int, y: Int) {
+    }
+
+    override val debugViewHeight = 0
 }

 object MStoXY: TerrarumAudioFilter() {
@@ -26,4 +32,9 @@ object MStoXY: TerrarumAudioFilter() {
            outbuf[1][i] = Y
        }
    }
+
+    override fun drawDebugView(batch: SpriteBatch, x: Int, y: Int) {
+    }
+
+    override val debugViewHeight = 0
 }
--- a/src/net/torvald/terrarum/ui/BasicDebugInfoWindow.kt
+++ b/src/net/torvald/terrarum/ui/BasicDebugInfoWindow.kt
@@ -114,14 +114,6 @@ class BasicDebugInfoWindow : UICanvas() {

    private infix fun Double.pow(b: Double) = Math.pow(this, b)

-    private fun Double?.toIntAndFrac(intLen: Int, fracLen: Int = 4): String =
-            if (this == null) "null" else if (this.isNaN()) "NaN" else if (this.isInfinite()) "${if (this >= 0.0) '+' else '-'}Inf" else
-                "${((if (this >= 0.0) "" else "-") + "${this.absoluteValue.toInt()}").padStart(intLen)}." +
-            (10.0 pow fracLen.toDouble()).let { d -> (this.absoluteValue.times(d) % d).toInt().toString().padStart(fracLen, '0').padEnd(fracLen) }
-    private fun Float?.toIntAndFrac(intLen: Int, fracLen: Int = 4): String =
-        if (this == null) "null" else if (this.isNaN()) "NaN" else if (this.isInfinite()) "${if (this >= 0.0) '+' else '-'}Inf" else
-            "${((if (this >= 0.0) "" else "-") + "${this.absoluteValue.toInt()}").padStart(intLen)}." +
-                    (10.0 pow fracLen.toDouble()).let { d -> (this.absoluteValue.times(d) % d).toInt().toString().padStart(fracLen, '0').padEnd(fracLen) }

    private val gap = 14f

@@ -379,44 +371,58 @@ class BasicDebugInfoWindow : UICanvas() {
    private val meterTroughHeight = meterGradCountMinusOne * meterGradSize + 5
    private val meterHeight = meterTroughHeight - 4

-    private val stripW = 54
-    private val halfStripW = stripW / 2
+    companion object {
+        fun Double?.toIntAndFrac(intLen: Int, fracLen: Int = 4): String =
+            if (this == null) "null" else if (this.isNaN()) "NaN" else if (this.isInfinite()) "${if (this >= 0.0) '+' else '-'}Inf" else
+                "${((if (this >= 0.0) "" else "-") + "${this.absoluteValue.toInt()}").padStart(intLen)}." +
+                        (10.0.pow(fracLen)).let { d -> (this.absoluteValue.times(d) % d).toInt().toString().padStart(fracLen, '0').padEnd(fracLen) }
+        fun Float?.toIntAndFrac(intLen: Int, fracLen: Int = 4): String =
+            if (this == null) "null" else if (this.isNaN()) "NaN" else if (this.isInfinite()) "${if (this >= 0.0) '+' else '-'}Inf" else
+                "${((if (this >= 0.0) "" else "-") + "${this.absoluteValue.toInt()}").padStart(intLen)}." +
+                        (10.0.pow(fracLen)).let { d -> (this.absoluteValue.times(d) % d).toInt().toString().padStart(fracLen, '0').padEnd(fracLen) }
+
+
+        val STRIP_W = 54
+
+        val COL_WELL = Color(0x374854_aa)
+        val COL_WELL2 = Color(0x3f5360_aa)
+        val COL_WELL3 = Color(0x485437_aa)
+        val COL_WELL4 = Color(0x543748_aa)
+        val COL_FILTER_TITLE = Color(0x5e656c_aa)
+        val COL_FILTER_TITLE_SHADE = Color(0x3b3f43_aa)
+        val COL_FILTER_WELL_BACK = Color(0x222325_aa)
+        val COL_MIXER_BACK = Color(0x0f110c_aa)
+        val COL_METER_TROUGH = Color(0x232527_aa)
+
+        val COL_METER_GRAD = Color(0x1c5075_aa)
+        val COL_METER_GRAD2 = Color(0x25a0f2_aa)
+
+        val COL_SENDS_GRAD = Color(0x5b711e_aa)
+        val COL_SENDS_GRAD2 = Color(0xbff12a_aa.toInt())
+
+        val COL_PROGRESS_GRAD = Color(0x762340_aa.toInt())
+        val COL_PROGRESS_GRAD2 = Color(0xf22e7b_aa.toInt())
+
+        val COL_METER_GRAD_YELLOW = Color(0x62471c_aa)
+        val COL_METER_GRAD2_YELLOW = Color(0xc68f24_aa.toInt())
+        val COL_METER_GRAD_RED = Color(0x921c34_aa.toInt())
+        val COL_METER_GRAD2_RED = Color(0xfa687d_aa.toInt())
+        val COL_METER_BAR = Color(0x4caee5_aa)
+        val COL_METER_BAR_OVER = Color(0xef8297_aa.toInt())
+        val COL_METER_COMP_BAR = Color(0xf3d458_aa.toInt())
+        val COL_METER_COMP_BAR2 = Color(0x7f6b18_aa.toInt())
+
+        val FILTER_NAME_ACTIVE = Color(0xeeeeee_bf.toInt())
+        val FILTER_BYPASSED = Color(0xf1b934_bf.toInt())
+    }
+
+    private val halfStripW = STRIP_W / 2
    private val stripGap = 1
    private val stripFilterHeight = 16
    private val stripFaderHeight = meterHeight + 20
    private val numberOfFilters = 10
    private val stripH = stripFaderHeight + stripFilterHeight * numberOfFilters + 16

-    private val COL_WELL = Color(0x374854_aa)
-    private val COL_WELL2 = Color(0x3f5360_aa)
-    private val COL_WELL3 = Color(0x485437_aa)
-    private val COL_WELL4 = Color(0x543748_aa)
-    private val COL_FILTER_TITLE = Color(0x5e656c_aa)
-    private val COL_FILTER_TITLE_SHADE = Color(0x3b3f43_aa)
-    private val COL_FILTER_WELL_BACK = Color(0x222325_aa)
-    private val COL_MIXER_BACK = Color(0x0f110c_aa)
-    private val COL_METER_TROUGH = Color(0x232527_aa)
-
-    private val COL_METER_GRAD = Color(0x1c5075_aa)
-    private val COL_METER_GRAD2 = Color(0x25a0f2_aa)
-
-    private val COL_SENDS_GRAD = Color(0x5b711e_aa)
-    private val COL_SENDS_GRAD2 = Color(0xbff12a_aa.toInt())
-
-    private val COL_PROGRESS_GRAD = Color(0x762340_aa.toInt())
-    private val COL_PROGRESS_GRAD2 = Color(0xf22e7b_aa.toInt())
-
-    private val COL_METER_GRAD_YELLOW = Color(0x62471c_aa)
-    private val COL_METER_GRAD2_YELLOW = Color(0xc68f24_aa.toInt())
-    private val COL_METER_GRAD_RED = Color(0x921c34_aa.toInt())
-    private val COL_METER_GRAD2_RED = Color(0xfa687d_aa.toInt())
-    private val COL_METER_BAR = Color(0x4caee5_aa)
-    private val COL_METER_BAR_OVER = Color(0xef8297_aa.toInt())
-    private val COL_METER_COMP_BAR = Color(0xf3d458_aa.toInt())
-    private val COL_METER_COMP_BAR2 = Color(0x7f6b18_aa.toInt())
-
-    private val FILTER_NAME_ACTIVE = Color(0xeeeeee_bf.toInt())
-    private val FILTER_BYPASSED = Color(0xf1b934_bf.toInt())
    private val trackBack = listOf(COL_WELL, COL_WELL2)

    private val trackCount = 16 // cannot call AudioMixer now
@@ -425,7 +431,7 @@ class BasicDebugInfoWindow : UICanvas() {

    private fun drawAudioMixer(batch: SpriteBatch) {

-        val x = App.scr.width - 186 - (AudioMixer.tracks.size + 1) * (stripW + stripGap)
+        val x = App.scr.width - 186 - (AudioMixer.tracks.size + 1) * (STRIP_W + stripGap)
        val y = App.scr.height - 38 - stripH

        val strips = AudioMixer.tracks + AudioMixer.masterTrack
@@ -440,7 +446,7 @@ class BasicDebugInfoWindow : UICanvas() {
            }

            // draw
-            drawStrip(batch, x + index * (stripW + stripGap), y, track, index)
+            drawStrip(batch, x + index * (STRIP_W + stripGap), y, track, index)
        }


@@ -513,35 +519,35 @@ class BasicDebugInfoWindow : UICanvas() {
    private fun drawStrip(batch: SpriteBatch, x: Int, y: Int, track: TerrarumAudioMixerTrack, index: Int) {
        // back
        batch.color = if (track.trackType == TrackType.MASTER) COL_WELL4 else if (track.trackType == TrackType.BUS) COL_WELL3 else trackBack[index % 2]
-        Toolkit.fillArea(batch, x, y, stripW, stripH)
+        Toolkit.fillArea(batch, x, y, STRIP_W, stripH)

        // strip/name separator
        batch.color = COL_METER_GRAD2
-        Toolkit.fillArea(batch, x, y + stripH - 16, stripW, 2)
+        Toolkit.fillArea(batch, x, y + stripH - 16, STRIP_W, 2)

        // track name
        batch.color = FILTER_NAME_ACTIVE
-        App.fontSmallNumbers.draw(batch, track.name, x + 1f + (stripW - track.name.length * 7) / 2, y + stripH - 13f)
+        App.fontSmallNumbers.draw(batch, track.name, x + 1f + (STRIP_W - track.name.length * 7) / 2, y + stripH - 13f)


        // filterbank back
        batch.color = COL_FILTER_WELL_BACK
-        Toolkit.fillArea(batch, x, y, stripW, stripFilterHeight * numberOfFilters)
+        Toolkit.fillArea(batch, x, y, STRIP_W, stripFilterHeight * numberOfFilters)

        var filterBankYcursor = 0
        track.filters.forEachIndexed { i, filter -> if (filter !is NullFilter) {
            // draw filter title back
            batch.color = COL_FILTER_TITLE_SHADE
-            Toolkit.fillArea(batch, x, y + filterBankYcursor, stripW, 16)
+            Toolkit.fillArea(batch, x, y + filterBankYcursor, STRIP_W, 16)
            batch.color = COL_FILTER_TITLE
-            Toolkit.fillArea(batch, x, y + filterBankYcursor, stripW, 14)
+            Toolkit.fillArea(batch, x, y + filterBankYcursor, STRIP_W, 14)
            // draw filter name
            batch.color = if (filter.bypass) FILTER_BYPASSED else FILTER_NAME_ACTIVE
            App.fontSmallNumbers.draw(batch, filter.javaClass.simpleName, x + 3f, y + filterBankYcursor + 1f)

            drawFilterParam(batch, x, y + filterBankYcursor + stripFilterHeight, filter, track)

-            filterBankYcursor += stripFilterHeight + paramViewHeight.getOrDefault(filter.javaClass.simpleName, 0)
+            filterBankYcursor += stripFilterHeight + filter.debugViewHeight
        } }

        val faderY = y + stripFilterHeight * numberOfFilters
@@ -559,15 +565,15 @@ class BasicDebugInfoWindow : UICanvas() {
            ).forEachIndexed { i, s ->
                // gauge background
                batch.color = COL_METER_TROUGH
-                Toolkit.fillArea(batch, x.toFloat(), faderY - (i + 1) * 16f, stripW.toFloat(), 14f)
+                Toolkit.fillArea(batch, x.toFloat(), faderY - (i + 1) * 16f, STRIP_W.toFloat(), 14f)

                // fill the song title line with a progress bar
                if (i == 0 && track.currentTrack != null) {
                    val perc = (track.currentTrack!!.samplesRead.toFloat() / track.currentTrack!!.samplesTotal).coerceAtMost(1f)
                    batch.color = COL_PROGRESS_GRAD2
-                    Toolkit.fillArea(batch, x.toFloat(), faderY - (i + 1) * 16f, stripW * perc, 14f)
+                    Toolkit.fillArea(batch, x.toFloat(), faderY - (i + 1) * 16f, STRIP_W * perc, 14f)
                    batch.color = COL_PROGRESS_GRAD
-                    Toolkit.fillArea(batch, x.toFloat(), faderY - (i + 1) * 16f + 14f, stripW * perc, 2f)
+                    Toolkit.fillArea(batch, x.toFloat(), faderY - (i + 1) * 16f + 14f, STRIP_W * perc, 2f)
                }

                batch.color = FILTER_NAME_ACTIVE
@@ -580,11 +586,11 @@ class BasicDebugInfoWindow : UICanvas() {
                val perc = ((mixDb + 24.0).coerceAtLeast(0.0) / 24.0).toFloat()
                // gauge background
                batch.color = COL_METER_TROUGH
-                Toolkit.fillArea(batch, x.toFloat(), faderY - (i + 1) * 16f, stripW.toFloat(), 14f)
+                Toolkit.fillArea(batch, x.toFloat(), faderY - (i + 1) * 16f, STRIP_W.toFloat(), 14f)
                batch.color = COL_SENDS_GRAD2
-                Toolkit.fillArea(batch, x.toFloat(), faderY - (i + 1) * 16f, stripW * perc, 14f)
+                Toolkit.fillArea(batch, x.toFloat(), faderY - (i + 1) * 16f, STRIP_W * perc, 14f)
                batch.color = COL_SENDS_GRAD
-                Toolkit.fillArea(batch, x.toFloat(), faderY - (i + 1) * 16f + 14f, stripW * perc, 2f)
+                Toolkit.fillArea(batch, x.toFloat(), faderY - (i + 1) * 16f + 14f, STRIP_W * perc, 2f)

                // label
                batch.color = FILTER_NAME_ACTIVE
@@ -597,11 +603,11 @@ class BasicDebugInfoWindow : UICanvas() {
            val perc = 1f
            // gauge background
            batch.color = COL_METER_TROUGH
-            Toolkit.fillArea(batch, x.toFloat(), faderY - (i + 1) * 16f, stripW.toFloat(), 14f)
+            Toolkit.fillArea(batch, x.toFloat(), faderY - (i + 1) * 16f, STRIP_W.toFloat(), 14f)
            batch.color = COL_SENDS_GRAD2
-            Toolkit.fillArea(batch, x.toFloat(), faderY - (i + 1) * 16f, stripW * perc, 14f)
+            Toolkit.fillArea(batch, x.toFloat(), faderY - (i + 1) * 16f, STRIP_W * perc, 14f)
            batch.color = COL_SENDS_GRAD
-            Toolkit.fillArea(batch, x.toFloat(), faderY - (i + 1) * 16f + 14f, stripW * perc, 2f)
+            Toolkit.fillArea(batch, x.toFloat(), faderY - (i + 1) * 16f + 14f, STRIP_W * perc, 2f)

            // label
            batch.color = FILTER_NAME_ACTIVE
@@ -610,7 +616,7 @@ class BasicDebugInfoWindow : UICanvas() {
        }

        // fader
-        val sliderX = x + stripW - 12
+        val sliderX = x + STRIP_W - 12

        // slider text
        val dB = track.dBfs
@@ -710,116 +716,9 @@ class BasicDebugInfoWindow : UICanvas() {
        }
    }

-    private val paramViewHeight = hashMapOf(
-        "Lowpass" to 16,
-        "Highpass" to 16,
-        "Buffer" to 16,
-        "BinoPan" to 32,
-        "Convolv" to 32,
-        "Gain" to 16,
-        "Scope" to stripW,
-    )
-
-
-    private val scopePlotCol = Color(0x61b3df_33)

    private fun drawFilterParam(batch: SpriteBatch, x: Int, y: Int, filter: TerrarumAudioFilter, track: TerrarumAudioMixerTrack) {
-        when (filter) {
-            is Lowpass -> {
-                val perc = linToLogPerc(filter.cutoff, 24.0, 24000.0).toFloat()
-                batch.color = COL_METER_GRAD2
-                Toolkit.fillArea(batch, x.toFloat(), y.toFloat(), stripW * perc, 14f)
-                batch.color = COL_METER_GRAD
-                Toolkit.fillArea(batch, x.toFloat(), y+14f, stripW * perc, 2f)
-
-                batch.color = FILTER_NAME_ACTIVE
-                App.fontSmallNumbers.draw(batch, "F:${filter.cutoff.toInt()}", x+3f, y+1f)
-            }
-            is Highpass -> {
-                val perc = 1f - linToLogPerc(filter.cutoff, 2.0, 24000.0).toFloat()
-                batch.color = COL_METER_GRAD2
-                Toolkit.fillArea(batch, x.toFloat() + stripW, y.toFloat(), -stripW * perc, 14f)
-                batch.color = COL_METER_GRAD
-                Toolkit.fillArea(batch, x.toFloat() + stripW, y+14f, -stripW * perc, 2f)
-
-                batch.color = FILTER_NAME_ACTIVE
-                App.fontSmallNumbers.draw(batch, "F:${filter.cutoff.toInt()}", x+3f, y+1f)
-            }
-            is BinoPan -> {
-                val w = filter.pan * 0.5f * stripW
-                batch.color = COL_METER_GRAD2
-                Toolkit.fillArea(batch, x + stripW / 2f, y.toFloat(), w, 14f)
-                batch.color = COL_METER_GRAD
-                Toolkit.fillArea(batch, x + stripW / 2f, y+14f, w, 2f)
-
-                batch.color = FILTER_NAME_ACTIVE
-                val panLabel = if (filter.pan == 0f) "<C>"
-                else if (filter.pan < 0) "L${filter.pan.absoluteValue.times(100).toIntAndFrac(3,1)}"
-                else "R${filter.pan.absoluteValue.times(100).toIntAndFrac(3,1)}"
-                App.fontSmallNumbers.draw(batch, panLabel, x+3f, y+1f)
-
-                App.fontSmallNumbers.draw(batch, "AS:${AudioMixer.SPEED_OF_SOUND.roundToInt()}", x+3f, y+17f)
-            }
-            is Buffer -> {
-                batch.color = FILTER_NAME_ACTIVE
-                App.fontSmallNumbers.draw(batch, "Bs:${AUDIO_BUFFER_SIZE}", x+3f, y+1f)
-            }
-            is Convolv -> {
-                // processing speed bar
-                val w = filter.processingSpeed
-                val perc = w.coerceAtMost(2f) / 2f
-                batch.color = if (w > 1.5f) COL_METER_GRAD2 else if (w > 1f) COL_METER_GRAD2_YELLOW else COL_METER_GRAD2_RED
-                Toolkit.fillArea(batch, x.toFloat(), y.toFloat(), stripW * perc, 14f)
-                batch.color = if (w > 1.5f) COL_METER_GRAD else if (w > 1f) COL_METER_GRAD_YELLOW else COL_METER_GRAD_RED
-                Toolkit.fillArea(batch, x.toFloat(), y+14f, stripW * perc, 2f)
-
-                // filter length bar
-                val g = FastMath.intLog2(AUDIO_BUFFER_SIZE)
-                val perc2 = (FastMath.intLog2(filter.fftLen).minus(g).toFloat() / (16f - g)).coerceIn(0f, 1f)
-                batch.color = COL_METER_GRAD2
-                Toolkit.fillArea(batch, x.toFloat(), y + 16f, stripW * perc2, 14f)
-                batch.color = COL_METER_GRAD
-                Toolkit.fillArea(batch, x.toFloat(), y + 16f+14f, stripW * perc2, 2f)
-
-                // texts
-                batch.color = FILTER_NAME_ACTIVE
-                App.fontSmallNumbers.draw(batch, "P:${filter.processingSpeed.times(100).roundToInt().div(100f)}x", x+3f, y+1f)
-                App.fontSmallNumbers.draw(batch, "L:${filter.fftLen}", x+3f, y+17f)
-            }
-            is Gain -> {
-                batch.color = FILTER_NAME_ACTIVE
-                App.fontSmallNumbers.draw(batch, "G:${fullscaleToDecibels(filter.gain.toDouble()).times(100).roundToInt().div(100f)}", x+3f, y+1f)
-            }
-            is Scope -> {
-//                batch.color = COL_FILTER_WELL_BACK
-//                Toolkit.fillArea(batch, 200, 200, 256, 256)
-
-                batch.color = scopePlotCol
-                val xxs = filter.backbufR
-                val yys = filter.backbufL
-//                var scopedSamples = 0
-                for (t in xxs.lastIndex downTo 0) {
-                    val xs = xxs[t]
-                    val ys = yys[t]
-
-                    for (i in xs.indices.reversed()) {
-                        /*val col = COL_METER_BAR.cpy().also {
-                            it.a *= 0.999f
-                        }
-                        batch.color = col*/
-                        val px = xs[i] * halfStripW + halfStripW
-                        val py = ys[i] * halfStripW + halfStripW
-                        Toolkit.fillArea(batch, x + px, y + py, 1f, 1f)
-
-
-//                        Toolkit.fillArea(batch, 328 + xs[i] * 128, 328 + ys[i] * 128, 1f, 1f)
-
-//                        scopedSamples++
-                    }
-
-                }
-            }
-        }
+        filter.drawDebugView(batch, x, y)
    }

    private val ICON_GREEN = Color(0x33ff33_bb.toInt())