I like Toly Pools v2 (computerscare) . Set the number of output channels to 1 and use the Rotation knob/port to select the desired input channel. Output will be monophonic.
Oraculus (Sanguine Monsters) is another 16 to 1 polyphonic to monophonic switch and has similar (and more) functions.
If you want to keep the output polyphonic and control multiple channels, Polyphonic Selector (Sparkette’s Stuff) might be worth a look. See:
Polyphonic Selector (Sparkette’s Stuff)
With this module, you can select one or more outputs from a polyphonic input signal (INPUT) through the voltages of another polyphonic input (SELECT).
Feed your primary polyphonic signal into the INPUT port. At the SELECT port, connect a polyphonic signal to control which input channel from the primary signal is displayed in the respective output channel. The number of channels of the selector signal determines the number of output channels (up to 16).
U…
The probably are more options.
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