Bass Pulse

Trigger Generator / Low Band Envelope Follower

The EMW Bass Pulse module generates trigger pulses from the low band of the audio signals by using a combination of a LPF and a comparator. It's possible, for example, create a trigger pulse in synchronization with a music's bass drum sound.
This way you can trigger envelopes, sequencers or any other module from your system, creating very interesting effects.
The module's low-pass filter operates below 200Hz, so all signals below this frequency can be used to generate the trigger pulses.
The Bass CV output generates a continuous control voltage that works similarly to an envelope follower (post LPF).

http://www.electronicmusicworks.com/eurorack/bass-pulse.html