PreenFM > preenfm2 and preenfm3

Reverb Algorithms

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matrix12x:
Has any tried programing a reverb FX for the Preen FM2? Or would it require too much memory?

I was looking at a few algorithms and was wondering if a simple IIR Filter followed by a simple low pass filter (to make it sound less metallic) would be doable?

IIR filter: http://www.eas.uccs.edu/~mwickert/ece5655/lecture_notes/ARM/ece5655_chap7.pdf

http://musicweb.ucsd.edu/~sdubnov/Mu172/Lectures/ReverberationDevicesAndGettingStarted.pdf


I was thinking this may require less ram than the Freeverb that was mentioned in another thread.
https://ccrma.stanford.edu/~jos/pasp/Freeverb.html

lokki:
i think comb filters are what is used in the freeverb as well. one will not do, since it sounds metallic...freeverb uses 4 i think...

matrix12x:
Yeah, Freeverb uses 4 comb filters in parallel set to different delays. and then sends that through two serial all pass filters.

prephylve1:
You could try using the envelopes to create a sudo reverb like on the Ensoniq SQ80. I’ve created a sudo delay by setting delays on the envelopes for each operator and then setting them to a macro knob to adjust the delay time. Works great!

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