UT-P (Digital Atavism)
There currently is little documentation on the channel selector UT-P (Digital Atavism), but at least there is a Reddit post with a short description (https://www.reddit.com/r/vcvrack/comments/1gpcroj/digital_atavism_free_open_source_vintage/).
UT-P is supplied with a polyphonic signal of up to 16 channels at its ‘IN’ port. A monophonic CV value (range 0-10V) fed to the ‘CV’ port determines on which channel the signal gets forwarded to the ‘OUT’ port. Only one output channel is active at a given time.
Every time a channel is selected, a trigger is sent on the respective channel of the ‘TRIG’ output port. At the ‘GATE’ output, the gate signal of that channel stays high as long as the channel is active/selected.