Motivation:

• We have no reverter at all right now. Reverters can popular in many cases: They allow extending drumkits by fading-in counterparts, which is often used for snares and cymbals. Also, in electronic music, reversing any kind of output is quite popular, especially after Echos/Reverbs.
• The reverter effect can easily be used as a Delay with a single boolean.

Function:

• The effect works with time slices, specified by nominator and denominator
• Two buffers, one records the current input, the other buffer writes its content (the previous record). At the end, both buffers are swapped. A boolean allows reverting the "write" phase.
• Discontinuities must be resolved properly
  • Only relevant if the reverter boolean is being used
  • The fade-out might be easy, since we can continue the wave, as we knew what was before the (original, non-reverted) wave -> We can simply fade out this part
  • The fade-in: Unlike fading in notes in e.g. ADsynth, where punch at the beginning is crucial, this is not the case here, so we can go with a rather slow fade-in to avoid clicks in all cases. Also note, the fade-in is the fade-out of the original wave, so it is never punchy. Suggestion: Take the slowest fade in time that we use for ADnote notes: ~256 samples at 44100 Hz = ~5ms.
  • Probably we must try out good solutions here