Available as an assembled Module and as a DIY project.
This Module is currently available.
Touchplate keyboard - eight keys
The ES35 is an extremely versatile manual controller. The Touch Responsive Keyboard (TRK) permits the performer to access up to 8 separate voltage presets and gate pulses. The TRK can be used to change the settings of other modules through voltage control, altering the characteristics of a sound patch and routing/switching events in live performance or in the studios.
In addition to the 8 individual 'pad' outputs, there is also a 'common' output for both the CV and the GATE. The CV output will output the highest voltage of all active pads
These merchants probably sell this module. Huh?