Available as an assembled Module and as a DIY project.
This Module is currently available.
Keyboard Controller Switch and Gate Trigger
The ELC Systems 3KM is an indispensable utility module that can function as a momentary gate source, or a momentary pass-through. With no input jack plugged in, each channel is normaled to 5v or 10v (selectable via switch), to use as a manual trigger. With an input jack connected, pressing each switch will temporarily unmute the channel and allow signal to pass through.
https://www.elc.systems/store/p/elc-systems-3km-mechanical-keyswitch
1 Users are observing this