The EnvVCA is a compact analog envelope generator with a built-in low-noise exponential VCA. It's a perfect companion to any VCO, whether you trigger it or self-cycle, and/or use the envelope output to modulate something else. With a wide time range from 30 minutes to 10kHz, it can be used as an LFO, slew limiter, audio or CV VCA, ASR/ADSR envelope generator, audio-rate oscillator, and more. 100% analog EnvVCA features: Versatile linear envelope generator/LFO Low-noise, low-distortion, DC-coupled exponential VCA 100% analog Sliders, switches and Time CV jack controls Rise and Fall times from 100µs (10kHz) to over 30 minutes With sliders and switches only: ~1.25ms to over 2 minutes Independent attenuverters for Rise and Fall time Blue/red LEDs indicate strength and polarity Cycle button for looping envelopes (LFO) Trigger input jack fires a one-shot envelope Cycle gate input jack toggles cycling EOR (End of Rise) gate output can be used to chain and sequence events Env Level slider controls output level of the Env jack without changing the VCA volume Audio In and Out jacks for passing audio or CV through the VCA VCA gain internally connected to envelope output Follow input jack allows for slew limiting, sustain (ASR), and exotic filtering effects Re-trig jumper allows for re-triggering during rise phase The EnvVCA is essentially half of a Dual EnvVCA, without the VCA CV jack and Offset knob. EnvVCA 8HP Eurorack format module 0.95” (24mm) maximum depth (includes power cable) 10-pin Eurorack power header Power consumption +12V: 83mA, -12V: 81mA Audio/VCA 100k input impedance, 1k output impedance, DC-coupled VCA gain range: -90dB to +0.9dB DC to 20kHz, +/-0.1dB VCA response to CV: exponential Envelope Times Minimum rise or fall time: ~50us (10kHz max frequency) Maximum rise or fall time: >10 minutes (typically 15-20 minutes per segment) Jacks: Env jack: when fall time > 11ms: Min = -5mV to +40mV, Max = +9.5V when fall time < 11ms: Min = -200mV to -5mV, Max = +9.5V Trigger jack: rising edge threshold = 2.5V Cycle jack: rising edge threshold = 2.5V Follow jack: active range = 0V to +5V EOR jack: 0V to 5V gate output Audio In/Out jacks: -10V to +10V maximum range without clipping
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