Transistor Ladder Voltage Controlled Low-pass Filter
From the manufacturer's website:
"Available as a custom shop build with option of brass faceplate and black aluminium knobs. Build time varies enquire maker@instruo.media for more information and for placing orders.
"The tràigh is a transistor ladder based, voltage controllable low-pass filter with a built in 3 channel mixer, coarse/fine COF controls, linear FM and 1V/oct tracking."
http://www.instruo.media/traigh
This Module is currently available.
$300