I have now installed the Teensy4.0 effects module into the Degenerator2. In Teensy I use the Stereo Plate reverb by Piotr Zapart on
www.hexefx.com
It is based on the 32-bit floating point OpenAudio_ArduinoLibrary from Chip Audette
Fx parameters
Main Controls
* Bypass button
* Size - reverb time
* Diffusion - lower values create more echo reflections in the reverb tail
* Mix - dry/wet mixer
Filter Controls
* LoCut - reverb tail bass loss
* HiCut - reverb tail treble loss
* Lowpass output treble control
* Hipass - output bass control
Freeze Controls
* Freeze on/off button
* BleedIn - controls how much of the input signal is fed into the reverb tank while in Freeze mode
Pitch Controls
* Pitch - main pitch shifter applied to the whole reverb sound, range from -12 to +24 semitones
* Pitch mix - main pitch shifter dry/wet mixer
Shimmer Controls
* Shimmer - amount of Shimmer effect applied to the reverb tail
* PitchShim - pitch setting for the Shimmer effect.
Sounds pretty decent. In this example, I'm playing a sample and adjusting the FX size and FX mix.