Share your delay/reverb designs!

kpn · June 22, 2021, 5:50am

My (rough) implementation of Dattorro’s reverb (mentioned in the videos linked above) in SuperCollider is here:

khoin/dx463-final/blob/master/sdefs.sc#L150


		DelayN.kr(
			1
			- (0.2 * (In.kr(shimmerDownCtrl) > -30.dbamp))
			+ (0.2 * (In.kr(shimmerUpCtrl) > -30.dbamp))
			, 1, 1));
	Out.ar(out, outsig);
}).add;

// Datorro REVERB
// Implemented https://ccrma.stanford.edu/~dattorro/EffectDesignPart1.pdf
SynthDef(\reverb, {
	arg in = 99,
		processMode = 0, // 0 uses Control values, 1 uses Bus for any param suffix Bus.
		gain = 0, mix = 0.35,
		processGain = 0, processGainBus = 99,
		preDelay = 0.001, bandwidth = 0.998,
		decayRate = 0.9, decayRateBus = 99,
		tailDensity = 0.7, damping = 0.0005,
		excursionDepth = 0.2, excursionRate = 2,
		shimmerPitch = 1, shimmerPitchBus = 99,
		out = 0;

If I remember correctly, it is NOT true to the paper in terms of where the taps are (and I never bothered to figure out). The code is 3 years old and I don’t think I’ve ever had an example of it as a stand-alone thing. But you might be able to get something out of how i implemented it