Reverb with a hold switch.

[Oldskin666]

Any of your existing reverbs but with a hold function would be so cool. Thank you.

 

[Travis]

I'm also interested

 

[Sans_Cœur]

You can practically add one to any of the FV-1 designs by connecting a SPST-switch (momentary or latching to taste) to lug 2 of the feedback/decay pot and one of the many 3V3-sources on the board, effectively ramping the feedback to maximum for the duration of you pressing the switch.