EG 2HP Envelope Generator Manual (PDF)
The 2hp EG is an ultra-compact, full-featured two-stage envelope generator. In your pursuit of hyper-complex, densely rhythmic percussion with polyrhythms, odd time signatures, and wild textures, this module can become a central utility—especially if you’re working within tight HP constraints or want multiple envelope generators in your system.
To exploit advanced rhythms, use several EGs—each trigged by a different clock division, pattern generator, or probabilistic gate. Sum their outputs to a VCA or combine them to modulate different drum/percussion voices, with each generator shaping a distinct percussive event at a distinct rhythmic subdivision.
Example Patch: - EG1: Trigged by a 5-step clock; CV modulating decay with a random stepped generator for irregular swing. - EG2: Trigged by a 7-step clock; CV modulating attack from a Euclidean pattern. - Both envelopes go to separate VCAs/drum modules, or are mixed to create staggered, polyphonic percussion bursts.
The CV inputs for attack and decay are critical for programmed complexity. Use LFOs, stepped random voltages, sequencers, or envelope followers to continually change the envelope shape.
Switch between linear and exponential responses for each rhythm or even automate the toggle with a “hand-on” approach during performance. Linear provides harder, more mechanical percussion; exponential gives you snappier, more natural drum contours.
The AMP knob can be used to program accents: Manually or via CV, reduce amplitude on unaccented steps to create ghost notes, or amplify certain pulses to make accented hits pop.
For even more unique results: Use the envelope OUT as an audio-rate source for "clicks," “ticks,” or layered percussive noise, especially with fast decay settings. The module slams out fast voltage spikes that can be filtered or waveshaped for glitchy percussion.
More Details: For exact jack and knob placement, power ratings, and user controls, view the full manual here.