preenfm Forum
PreenFM => preenfm2 and preenfm3 => Topic started by: matrix12x on January 03, 2018, 12:32:00 AM
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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
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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...
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Yeah, Freeverb uses 4 comb filters in parallel set to different delays. and then sends that through two serial all pass filters.
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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!