Biquad Filter Test

Original signal: sum of 2 sine waves (220Hz and 3500Hz)

Cutoff: 1200, Q: 0.6
Cutoff: 1200, Q: 0.6
f0: 300, Q: 0.6
centerFreq: 250, bandwidth: 1 octave
centerFreq: 3333, bandwidth: 1 octave