The Instruō [1]f is a crossfader, attenuator, attenuverter and manual DC offset.

Whether you want to crossfade between two audio signals, attenuate an envelope, invert a sawtooth LFO for ramped modulation, or use a DC offset to access the Mod parameters of your arbhar, [1]f is the perfect multi-utility for all of your CV processing tasks.

[1]f | noun (utility) because one is one

Size:
2HP
Depth: 27mm

Power:
+12V: 8mA
–12V: 8mA

Features:

Crossfader
Attenuator & Attenuverter
Unipolar positive or unipolar negative DC offset
DC coupled for both audio and control voltage processing
Bicolour LED indication of output voltage