A handy CV utility for setting up key follow. Great for closing the filter, for example, as the pitch gets lower. This behavior can be inverted if needed. The key follow amount goes to 500%, in case a boost is needed to overcome an attenuated input.

If a poly input is connected, it will be processed and sent to the poly output. However, if you also have a mono input connected, it will be processed and sent to the mono output separately. If a mono input is not provided, the mono output will contain a mix of the poly voices.