diff --git a/src/net/torvald/terrarum/audio/AudioMixer.kt b/src/net/torvald/terrarum/audio/AudioMixer.kt
index c76a2eb17..3e9db0e1c 100644
--- a/src/net/torvald/terrarum/audio/AudioMixer.kt
+++ b/src/net/torvald/terrarum/audio/AudioMixer.kt
@@ -130,12 +130,14 @@ object AudioMixer: Disposable {
             it.addSidechainInput(sfxMixTrack, 1.0)
         }
 
-        convolveBusOpen.filters[0] = Convolv(ModMgr.getFile("basegame", "audio/convolution/EchoThief - Cranbrook Art Museum.bin"))
-        convolveBusOpen.filters[1] = Gain(decibelsToFullscale(21.0).toFloat())
+        convolveBusOpen.filters[0] = Highpass(80f)
+        convolveBusOpen.filters[1] = Convolv(ModMgr.getFile("basegame", "audio/convolution/EchoThief - Cranbrook Art Museum.bin"))
+        convolveBusOpen.filters[2] = Gain(decibelsToFullscale(18.0).toFloat())
         convolveBusOpen.volume = 0.5
 
-        convolveBusCave.filters[0] = Convolv(ModMgr.getFile("basegame", "audio/convolution/EchoThief - CedarCreekWinery.bin"))
-        convolveBusCave.filters[1] = Gain(decibelsToFullscale(18.0).toFloat())
+        convolveBusCave.filters[0] = Highpass(80f)
+        convolveBusCave.filters[1] = Convolv(ModMgr.getFile("basegame", "audio/convolution/EchoThief - CedarCreekWinery.bin"))
+        convolveBusCave.filters[2] = Gain(decibelsToFullscale(18.0).toFloat())
         convolveBusCave.volume = 0.5
 
         fadeBus.addSidechainInput(sumBus, 1.0 / 3.0)
@@ -187,6 +189,14 @@ object AudioMixer: Disposable {
                 it.pan = (it.pan - 0.001f).coerceIn(-1f, 1f)
             }
         }*/
+        if (Gdx.input.isKeyPressed(Input.Keys.UP)) {
+            convolveBusOpen.volume = (convolveBusOpen.volume + 0.001).coerceIn(0.0, 1.0)
+            convolveBusCave.volume = 1.0 - convolveBusOpen.volume
+        }
+        else if (Gdx.input.isKeyPressed(Input.Keys.DOWN)) {
+            convolveBusOpen.volume = (convolveBusOpen.volume - 0.001).coerceIn(0.0, 1.0)
+            convolveBusCave.volume = 1.0 - convolveBusOpen.volume
+        }
 
 
 
diff --git a/src/net/torvald/terrarum/audio/TerrarumAudioMixerTrack.kt b/src/net/torvald/terrarum/audio/TerrarumAudioMixerTrack.kt
index 8774a49d3..1aa622f8d 100644
--- a/src/net/torvald/terrarum/audio/TerrarumAudioMixerTrack.kt
+++ b/src/net/torvald/terrarum/audio/TerrarumAudioMixerTrack.kt
@@ -20,7 +20,7 @@ class TerrarumAudioMixerTrack(val name: String, val isMaster: Boolean = false, v
         const val SAMPLING_RATE = 48000
         const val SAMPLING_RATEF = 48000f
         const val SAMPLING_RATED = 48000.0
-        const val BUFFER_SIZE = 16384 // n ms -> 384 * n
+        const val BUFFER_SIZE = 65536 // n ms -> 384 * n
     }
 
     val hash = getHashStr()
diff --git a/src/net/torvald/terrarum/ui/BasicDebugInfoWindow.kt b/src/net/torvald/terrarum/ui/BasicDebugInfoWindow.kt
index 6f37a017b..429604208 100644
--- a/src/net/torvald/terrarum/ui/BasicDebugInfoWindow.kt
+++ b/src/net/torvald/terrarum/ui/BasicDebugInfoWindow.kt
@@ -600,6 +600,7 @@ class BasicDebugInfoWindow : UICanvas() {
 
     private val paramViewHeight = hashMapOf(
         "Lowpass" to 16,
+        "Highpass" to 16,
         "Buffer" to 16,
         "BinoPan" to 32,
         "Convolv" to 16,
@@ -622,6 +623,16 @@ class BasicDebugInfoWindow : UICanvas() {
                 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