void processAudio(AudioBuffer &buffer){
double rate = getSampleRate();
unsigned int sampleDelay = getSampleDelay(getRampedParameterValue(PARAMETER_A), rate);
sampleDelay = min(sampleDelay, bufferSize);
float feedback = getRampedParameterValue(PARAMETER_B);
float bias = getBiasExponent(1 - getRampedParameterValue(PARAMETER_C));
float dryWetMix = getRampedParameterValue(PARAMETER_D);
int size = buffer.getSize();
for(int ch = 0; ch<buffer.getChannels(); ++ch)
{
float* buf = buffer.getSamples(ch);
for (int i=0; i<size; ++i)
{
float delaySample = circularBuffer[writeIdx];
float v = buf[i] + circularBuffer[writeIdx] * feedback;
v = applyBias(v, bias);
circularBuffer[writeIdx] = min(1, max(-1, v)); // Guard: hard range limits.
buf[i] = linearBlend(buf[i], delaySample, dryWetMix);
writeIdx = (++writeIdx) % sampleDelay;
}
}
}
void BiasedDelay::processChannelBlock(int size, float* buf, float* delayBuf, int delayBufIdx){
unsigned int sampleDelay = getSampleDelay(getParameterValue(PARAMETER_TIME));
float feedback = getParameterValue(PARAMETER_FEEDBACK);
float bias = getBiasExponent(1 - getParameterValue(PARAMETER_BIAS));
float dryWetMix = getParameterValue(PARAMETER_DRYWET);
for (int i=0; i<size; i++)
{
float delaySample = delayBuf[delayBufIdx];
float v = buf[i] + delaySample * feedback;
v = applyBias(v, bias);
delayBuf[delayBufIdx] = softLimit(v); // Guard: range limit.
buf[i] = sigmoidXFade(buf[i], delaySample, dryWetMix);
delayBufIdx = (++delayBufIdx) % sampleDelay;
}
}