// feedforward
Noise n => Delay delay => dac;
// feedback
delay => OneZero lowpass => delay;
// set noise gain
.8 => n.gain;

// set delay
500::samp => delay.delay;
// set lowpass zero position
-1 => lowpass.zero;
// set feedback gain
.99 => lowpass.gain;

// fire!
500::samp => now;
// turn off noise
0 => n.gain;

// advance time
10::second => now;