recently madrona labs released a very lovely reverb plugin called altoverb.
i think it sounds great – and apparently it’s pretty lightweight…
the developer, randy jones, was kind enough to make the code available for anyone who would like to port it to other platforms:
I’ve just updated the madronalib source with a couple of new sound examples based on RtAudio. One of these is an Aaltoverb example. If anyone’s interested in porting it to norns (or anywhere), feel free to ask me any questions you have.
The basic algorithm of this is something that I’ve been playing with for a long time, since I made the yafr~ example for Max/MSP (in 2001 or so?) based on the Dattorro paper that gave away the idea behind one reverb “in the style of Greisinger.” (Lexicon)
My newer take on it is that all the allpass delay lines are smoothly modulatable using an idea proposed in “A Lossless, Click-free, Pitchbend-able Delay Line Loop Interpolation Scheme” (Van Duyne, Jaffe, Scandalis, Stilson, ICMC 1997.) So the size can vary from small to large without clicks, which I won’t claim is unique but I don’t hear most reverbs doing.
i’m wondering if a version of this could make it’s way into the 301? i know the C++ layer is currently only accessible to @odevices - so i guess this is a bit of a direct request