=======
Impulse
=======

**Chuck**

::

	Impulse i => BiQuad f => dac;
	.99 => f.prad;
	1 => f.eqzs;
	0.0 => float v;

	while( true ) {
	  1.0 => i.next;
	  Std.fabs(Math.sin(v)) * 4000.0 => f.pfreq;
	  v + .1 => v;
	  100::ms => now;
	}

**Stride** 


::

	signal Phase { rate: 10 }
	signal Frequency { rate: none }

	Phase >> Sin () >> Abs () >> Level ( gain: 4000.0 ) >> Frequency;
	Phase + 0.1 >> Phase;
	ImpulseTrain ( frequency: 10 ) >> BiQuad ( type: 'LowPass' frequency: Frequency resonance: 2.0 ) >> AudioOut;

::

	signal Frequency { rate: 10.0}
	signal Phase { default: -0.1 rate: none}

	Phase + 0.1 >> Phase >> Sin () >> Abs () >> Level ( gain: 4000.0 ) >> Frequency;
	ImpulseTrain ( frequency: 10.0 ) >> BiQuad ( type: 'LowPass' frequency: Frequency resonance: 2.0 ) >> AudioOut;