The PI (percussion interface) turns virtually any audio source from microphone, instrument and line level into CV and clock/gate signals. The PI and PI Expander are suited for synchronising sequencers or other modules to the rhythm of an audio track or live percussion. The modules can simultaneously be used as a pre-amp for microphones or line-level signals, while generating inverted envelopes useful for side-chaining. The PI module contains all the core functionality and can be used without the Expander to conserve space. The Expander requires the main PI modules and adds three gain stage options, a modular-level audio output jack, a 1/4" (6.35mm) input jack, and envelope attenuation capabilities. The two modules are only sold together, they are not available separately. Video: https://youtu.be/QxHfp9YFXQM?t=836Product Specs Item Number: 16111 Make: 4ms Model: Percussion Interface Condition: Brand New Finish: White Categories: keyboards-and-synths ⇒ eurorack Function: Envelope Follower External Envelope Generator Made In: United States MPN: PI+EXPw Modular Grid: Eurorack ⓘ ＋ Dimensions*: 4 HP 25 mm deep Power*: 69 mA +12V 56 mA -12V 0 mA 5V * User contributed details
![4ms Percussion Interface + Expander [PI+EXP]](https://cdn.shopify.com/s/files/1/0267/6952/2736/products/4ms_perc_exp.png?v=1646464862&width=480)