Author Topic: Reverb Algorithms  (Read 279 times)

matrix12x

  • Team Member
  • **
  • Posts: 61
    • View Profile
Reverb Algorithms
« on: January 03, 2018, 12:32:00 AM »
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

  • Team Member
  • ***
  • Posts: 204
    • View Profile
Re: Reverb Algorithms
« Reply #1 on: January 03, 2018, 10:07:18 AM »
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

  • Team Member
  • **
  • Posts: 61
    • View Profile
Re: Reverb Algorithms
« Reply #2 on: January 04, 2018, 12:33:33 AM »
Yeah, Freeverb uses 4 comb filters in parallel set to different delays. and then sends that through two serial all pass filters.

prephylve1

  • Team member
  • *
  • Posts: 10
    • View Profile
Re: Reverb Algorithms
« Reply #3 on: February 25, 2018, 09:38:07 AM »
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!