Percussion Interface + Expander [PI+EXP]

The Percussion Interface (PI) and PI Expander are a pair of Eurorack modules that generate gates and envelopes from acoustic drums, samplers, drum machines, and virtually any audio source. Converting microphone, instrument, line and modular signals into CV and clock/gate signals, the PI and PI Expander are suited for synchronizing 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. The Percussion Interface (PI) and PI Expander are a pair of Eurorack modules that generate gates and envelopes from acoustic drums, samplers, drum machines, and virtually any audio source. Converting microphone, instrument, line and modular signals into CV and clock/gate signals, the PI and PI Expander are suited for synchronizing 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. Electrical and Mechanical Specifications:   Module size (PI): 4 HP Eurorack formal module 0.98" (25mm) maximum depth with power cable 10-pin Eurorack power header Module size (PI EXP): 4 HP Eurorack formal module 0.98" (25mm) maximum depth with power cable 8-pin cable connects to PI Power consumption: with PI Expander +12V: 104mA -12V: 65mA without PI Expander +12V: 69mA -12V: 56mA Audio Inputs: 1/8” [3.5mm] on PI main module, and 1/4” [6.35mm] on PI Expander 100k input impedance, AC-coupled Audio Outputs: Voltage range: -10.4V to +10.8V, DC-coupled 1k output impedance Gain Characteristics Gain range: < -100dB to +54dB (500x) Clip light turns blue when signal (post-gain) exceeds 2.5Vpp Gate is triggered when signal (post-gain) exceeds 6.3Vpp Clip light flashes red when signal clips on Audio Out jack (exceeds +10.8V) Gate Out Jack 1k output impedance +8V gate/trigger signal 6ms – 0.5s pulse width + Env Out jack (jack on PI main module) 1k output impedance +9V peak (sustain), -60mV resting (off) 15ms attack time 70ms – 6s exponential decay time (1% of peak voltage) - Env Out Jack (jack on PI main module) 1k output impedance +9V resting (off), -150mV peak (sustain) 15ms attack time 70ms – 6s exponential decay time (1% of peak voltage) Env. Out jack (attenuated jack on PI Expander) 1k to 26k variable output impedance +9V maximum -60mV minimum Inv. Out jack (attenuated jack on PI Expander) 1k to 26k variable output impedance +9V maximum -150mV minimum   Included with the PI+EXP:   8-to-16 pin power cable 8-to-8 pin cable for connecting to the Expander M3 Knurlie screws (4)