Fiboverb

Fast scaling of non coincident delays

This reverb arose from a discussion on pd-list about Fibonacci numbers and their properties. What surprised me when testing this patch is the amazingly useful way the interface scales the pattern for those effects which lie between dense reverb and rythmnic multi-tap delays. Fixing or varying the sequence start and scaling factor gives a very fast way to dial in the tone, scattering and get it all to line up relative to a beat just how you like in seconds.

fiboverb screenshot

Download the patch here. compressed tar file .bz2

How does it work?

The core is a variable delay network, we just specify a way of setting a bunch of delay values, 16 of them, to create an acoustic space. We compute a sequence of 16 fibonacci numbers using a closed form equation of fib starting at an offset (greater than two). Each of these is multiplied by a scaling factor to obtain a delay time.

Interface

There are two sliders, one to set the scale and the other to set the start of the sequence.

DSP

All delays are implemented by the [vdn~] unit.

What can I do with this?

Should be very nice on a range of percussive parts and beats if tuned just right.

Links