2 // to be legit, we should be polling another sinosc (see sixty.ck, pwm.ck)
12 sinosc modulation => sinosc carrier => dac;
14 fm => modulation.sfreq;
21 fc + ampM * modulation.last => carrier.sfreq;
31 120.0 + 120.0 * math.sin( t * 0.2 ) => fm; //modulate modulators
32 fm => modulation.sfreq;
34 100.0 + 50.0 * math.sin ( t * 0.05 ) => ampM; //modulate mod amplitude.