FDN Delayline modulation
I am testing the delay modulation algorithm for a new reverb I am working on. It is not meant initially to faithfully reproduce natural room reverberation (but I don’t mind if it does). Rather the delay length modulation is meant to be heard as a blend between chorus / reverberation / ensemble / unison and the initial design goal is to make it sound good on synthetic sounds first.
Here are some cinematic examples made with a very crude Feedback Delay Network prototype made in MaxMSP with only 4 delays and no loop filtering. Delay times were set manually without special care about being mutually prime. RT60: 10 seconds Modulation depth: 10-20 cents
Edit: This early prototype has considerably evolved into a dedicated product which is now called SparkVerb and is available as an audio plugin.