curioustorvald/Terrarum
1
0
Fork 0
mirror of https://github.com/curioustorvald/Terrarum.git synced 2026-03-08 04:41:51 +09:00
Code Issues Packages Projects Releases Wiki Activity

turns out wikipedia just flat out give you a code for LP/HP filter

Browse Source
This commit is contained in:
minjaesong
2023-11-19 20:34:40 +09:00
parent 04144fff08
commit 7b7f19e218
1 changed files with 3 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
src/net/torvald/terrarum/audio/TerrarumAudioFilter.kt
View File

@@ -57,7 +57,7 @@ class Lowpass(cutoff0: Float, val rate: Int): TerrarumAudioFilter() {
out[0] = outbuf0[ch].last()
for (i in 1 until outbuf1[ch].size) {
out[i] = out[i-1] + (alpha * (inn[i] - out[i-1]))
out[i] = out[i-1] + alpha * (inn[i] - out[i-1])
}
}
}
@@ -86,7 +86,7 @@ class Highpass(cutoff0: Float, val rate: Int): TerrarumAudioFilter() {
// println("LP Cutoff: $cutoff")
val RC: Double = 1.0 / (cutoff * Math.PI * 2.0)
val dt: Double = 1.0 / rate
alpha = (dt / (RC + dt)).toFloat()
alpha = (RC / (RC + dt)).toFloat()
this.cutoff = cutoff
}
@@ -98,7 +98,7 @@ class Highpass(cutoff0: Float, val rate: Int): TerrarumAudioFilter() {
out[0] = outbuf0[ch].last()
for (i in 1 until outbuf1[ch].size) {
out[i] = inn[i] - inn[i-1] + (alpha * out[i-1]) // this actually works but setCutoff need to be changed
out[i] = alpha * (out[i-1] + inn[i] - inn[i-1])
}
}
}