Gordonjcp/chassis
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workingish highpass filter

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This commit is contained in:
Gordon JC Pearce 2024-09-12 15:10:16 +01:00
parent 1c8f451c3a
commit cdca13f412
3 changed files with 27 additions and 4 deletions
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21
plugin/chassis.cpp
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@ -159,6 +159,27 @@ void Chassis::run(const float **, float **outputs, uint32_t frames, const MidiEv
s.blockLeft -= sizeThisTime;
}
// highpass filter
float tmp = s.hptmp;
float smp, flt=0;
float cut_tbl[4] = {0.91245, 0.97097, 1, 0.99088};
float cut = cut_tbl[(s.patchRam.switch2 & 0x18) >> 3];
float gain_tbl[4] = {-1, -1, 0, 4};
float gain = gain_tbl[(s.patchRam.switch2 & 0x18) >> 3];
// printf("hp= %02x\n", (s.patchRam.switch2 & 0x18)>>3);
for (uint32_t i = 0; i < frames; i++) {
smp = outputs[0][i];
flt = ((tmp - smp) * cut) + smp;
tmp = flt;
outputs[0][i] = ((flt * gain) + smp);
}
s.hptmp = flt;
// copy left to right
memmove(outputs[1], outputs[0], sizeof(float) * frames);
// outputs[1][1]=1;

9
plugin/parameters.cpp
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@ -149,7 +149,7 @@ void Chassis::initParameter(uint32_t index, Parameter& parameter) {
parameter.name = "HPF";
parameter.symbol = "ch_hpf";
parameter.ranges.min = 0.0f;
parameter.ranges.max = 3.0f;
parameter.ranges.max = 3.9f;
parameter.ranges.def = 0.0f;
parameter.midiCC = 20;
break;
@ -397,9 +397,10 @@ void Chassis::setParameterValue(uint32_t index, float value) {
case paramHPF: // bits 3-4 of switch 2
// doesn't look great in Carla because of odd behaviour with small integer knobs
printf("setPV %d %f\n", index, value);
if (value > 3) value = 3;
s.patchRam.switch2 &= 0xf3;
s.patchRam.switch2 |= (int)value << 3;
s.patchRam.switch2 &= 0xe7;
s.patchRam.switch2 |= (3-(int)value )<< 3;
break;
case paramModWheel:
@ -452,7 +453,7 @@ float Chassis::getParameterValue(uint32_t index) const {
return s.patchRam.noise;
break;
case paramHPF:
return (s.patchRam.switch2 & 0x18) >> 3;
return 3-((s.patchRam.switch2 & 0x18) >> 3);
break;
case paramVCFFreq:
return s.patchRam.vcfFreq;

1
plugin/voice.hpp
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@ -133,6 +133,7 @@ class Synth {
} patchRam;
float pitchCV[104];
float hptmp;
void runLFO();
void lfoDelay();