Devin Dominguez devin-dominguez

Dirtywave M8 Shortcuts

	// phase in range 0 <= phase < 1
	// pwm in range -1 <= pwm <= 1

	dt = frequency / samplerate

	saw(phase, dt) {
	return phase * 2 - 1 - polyBlep(phase, dt)
	}

	pulse(phase, dt, pwm = 0) {

	Feedback Delay Network for Reverb

	A = (a + b) + (c + d) + L
	B = (a - b) + (c - d) + R
	C = (a + b) - (c + d)
	D = (a - b) - (c - d)

	Max feedback should be 0.5 at the very most to avoid nastiness.

	Each delay line should have a delay time that is not correlated to any other delay line's time.

	sqrt(2) / 2 = 0.7071067811865476
	p in range of -PI/2 to PI/2, or -0.125 to 0.125 when normalized
	A = (sqrt(2) / 2) * (cos(p) - sin(p))
	B = (sqrt(2) / 2) * (cos(p) + sin(p))

	phasor -> variable angle unipolar triangle function -> * 0.5 -> cosine lookup
	adjust the angle on the triangle to morph between sine and pseudo-saw
	can offset saw phase and subtract to get a psuedo-square (as per ususal)

	triangle function:
	angle range 0 to 1 with 0.5 being symetrical
	if (phase <= angle) phase / angle
	if (phase > angle) phase - 1 / angle -1

	by scaling by 0.5 we get the first half of the cosine, and then that same first half but in reverse (which is == to the 2nd half)

	(((stepNumber + offset) * numberOfHits) % cycleLength) < numberOfHits
	true for hits, false for rests