Guitar and Audio to MIDI, USB and CV Converter Module for Eurorack. The PP1 is a compact Eurorack module that converts your guitar or any audio signal to MIDI, USB and CV to work with any of your favorite synthesizers. Surprise the crowd during a live performance or add new layers and characteristics to your songs by simply changing up the instrument plugged in to the PP1. The PP1 also accurately tracks the pitch of any mono source plugged in to be used as CV for any other synth in the chain. Controls include Hi-Z and Low Cut switches plus a gain control with up to 50 dB of gain for mics and other line level sources.