void ThreeBandEqNode::recompute() {
double lowbandFreq=getProperty(Lav_THREE_BAND_EQ_LOWBAND_FREQUENCY).getFloatValue();
double lowbandDb=getProperty(Lav_THREE_BAND_EQ_LOWBAND_DBGAIN).getFloatValue();
double midbandDb=getProperty(Lav_THREE_BAND_EQ_MIDBAND_DBGAIN).getFloatValue();
double highbandFreq = getProperty(Lav_THREE_BAND_EQ_HIGHBAND_FREQUENCY).getFloatValue();
double highbandDb= getProperty(Lav_THREE_BAND_EQ_HIGHBAND_DBGAIN).getFloatValue();
double midbandFreq = lowbandFreq+(highbandFreq-lowbandFreq)/2.0;
//low band's gain is the simplest.
lowband_gain=dbToScalar(lowbandDb, 1.0);
//The peaking filter for the middle band needs to go from lowbandDb to midbandDb, i.e.:
double peakingDbgain =midbandDb-lowbandDb;
//And the highband needs to go from the middle band to the high.
double highshelfDbgain=highbandDb-midbandDb;
//Compute q from bw and s, using an arbetrary IIR filter.
//The iir filters only care about sr, so we can just pick one.
double peakingQ=midband_peaks[0]->qFromBw(midbandFreq, (highbandFreq-midbandFreq)*2);
double highshelfQ = highband_shelves[0]->qFromS(highbandFreq, 1.0);
for(int i = 0; i < channels; i++) {
midband_peaks[i]->configureBiquad(Lav_BIQUAD_TYPE_PEAKING, midbandFreq, peakingDbgain, peakingQ);
highband_shelves[i]->configureBiquad(Lav_BIQUAD_TYPE_HIGHSHELF, highbandFreq, highshelfDbgain, highshelfQ);
}
}
double dbToGain(double db) {
return dbToScalar(db, 1.0);
}
