Flute f => PRCRev r => dac; 0.05 => r.mix; 440 => f.freq; f.noteOn(0.75);
SawOsc b => r => dac; 220 => b.freq; 0.1 => b.gain; 0.35 => dac.gain;
while (true) {100::ms => now; f.freq(1.01*f.freq()); b.freq(1.01*b.freq());}