void processAudio(AudioBuffer &buffer) {
float tune = getParameterValue(PARAMETER_A)*10.0 - 6.0;
float fc = getParameterValue(PARAMETER_B)*10.0 - 4.0;
float q = getParameterValue(PARAMETER_C)*3+0.75;
float shape = getParameterValue(PARAMETER_E)*2;
float pw = 0.5;
if(shape > 1.0){
pw += 0.49*(shape-1.0); // pw 0.5 to 0.99
shape = 1.0; // square wave
}
float df = getParameterValue(PARAMETER_D)*4;
int di = (int)df;
float gain = 0.0f;
switch(di){
// a/d
case 0: // l/s
env.setAttack(1.0-df);
env.setRelease(0.0);
break;
case 1: // s/s
env.setAttack(0.0);
env.setRelease(df-1);
break;
case 2: // s/l
env.setAttack(df-2);
env.setRelease(1.0);
break;
case 3: // l/l
env.setAttack(1.0);
env.setRelease(1.0);
gain = df-3;
break;
}
env.trigger(isButtonPressed(PUSHBUTTON), getSamplesSinceButtonPressed(PUSHBUTTON));
FloatArray left = buffer.getSamples(LEFT_CHANNEL);
FloatArray right = buffer.getSamples(RIGHT_CHANNEL);
// vco
hz.setTune(tune);
float lfreq = hz.getFrequency(left[0]);
osc.setFrequency(lfreq);
osc.setShape(shape);
osc.setPulseWidth(pw);
osc.getSamples(left);
// vcf
hz.setTune(fc);
fc = hz.getFrequency(right[0]);
fc = min(0.999, max(0.01, fc/(getSampleRate()*2))); // normalised and bounded
filter->setLowPass(fc, q);
right.copyFrom(left);
filter->process(right);
right.multiply(0.8-q*0.2); // gain compensation for high q
// vca
env.getEnvelope(envelope);
envelope.add(gain);
left.multiply(envelope);
right.multiply(envelope);
}
DualASRPatch() : eg1(getSampleRate()), eg2(getSampleRate()) {
registerParameter(PARAMETER_A, "Attack");
registerParameter(PARAMETER_B, "Release");
registerParameter(PARAMETER_C, "Attack");
registerParameter(PARAMETER_D, "Release");
eg1.setSustain(1.0);
eg1.setDecay(0.0);
eg2.setSustain(1.0);
eg2.setDecay(0.0);
}
SynthVoicePatch() : osc(getSampleRate()), env(getSampleRate()) {
registerParameter(PARAMETER_A, "Pitch");
registerParameter(PARAMETER_B, "Fc");
registerParameter(PARAMETER_C, "Resonance");
registerParameter(PARAMETER_D, "Envelope");
registerParameter(PARAMETER_E, "Waveshape");
env.setSustain(1.0);
env.setDecay(0.0);
env.setRelease(0.0);
envelope = FloatArray::create(getBlockSize());
filter = BiquadFilter::create(4); // 8-pole filter 48dB
}
void processAudio(AudioBuffer &buffer){
eg1.setAttack(getParameterValue(PARAMETER_A)*2);
eg1.setRelease(getParameterValue(PARAMETER_B)*2);
eg2.setAttack(getParameterValue(PARAMETER_C)*2);
eg2.setRelease(getParameterValue(PARAMETER_D)*2);
FloatArray left = buffer.getSamples(LEFT_CHANNEL);
FloatArray right = buffer.getSamples(RIGHT_CHANNEL);
eg1.getEnvelope(left);
eg2.getEnvelope(right);
left.multiply(-1);
right.multiply(-1);
}
void buttonChanged(PatchButtonId bid, uint16_t value, uint16_t samples){
if(bid == PUSHBUTTON){
eg1.gate(value, samples);
eg2.gate(value, samples);
}
}
void gate(bool state){
env.gate(state);
}
float getNextSample(float fm){
return env.getNextSample()*index*osc.getNextSample(fm);
}
void setEnvelope(float a, float d, float s, float r){
env.setAttack(a);
env.setDecay(d);
env.setSustain(s);
env.setRelease(r);
}
