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RETRIG Jumper
The RETRIG jumper on the back of the module changes the EnvVCA's behavior when it
receives a trigger while an envelope is already running. When the jumper is not installed
(factory default), triggers received as the envelope is rising will be ignored, and triggers
received while the envelope is falling will make it begin rising again from its current
voltage.
When the jumper is installed, the EnvVCA will immediately restart the envelope when it
receives a trigger, regardless of whether the envelope is rising or falling. When this
happens, the envelope will immediately fall to 0V and begin to rise again. The sharp
transition to 0V can cause clicking when used with the audio VCA section.
See the Creating Envelopes section for more details.
VCA Min Gain Trim pot
On the back of the module is a trimpot that can adjust the minimum VCA
Gain. Typically, you will want to set this such that when the envelope is not
running, you do not hear any audio bleeding through. However, setting the
minimum gain too quiet means that when the EnvVCA is cycling, there are
longer gaps between notes. That is, there is more time between envelope
peaks where the sound is inaudible or barely audible.
At fully counter-clockwise, the VCA will provide -90dB of attenuation when
the envelope is not cycling. This is the maximum amount of silence
between notes when cycling and minimum amount of bleed. In the middle
position (factory default), there is -80dB of attenuation. This is factory
default position. It provides a short amount of silence between envelope
cycles, and low amount of bleed. Turning the trim pot all the way clockwise
provides -30dB of attenuation when the envelope is stopped. This may be
useful if you wants less silence between cycles, and don't mind hearing some audio when the envelope
is not cycling.
Electrical and Mechanical Specifications
• 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
•
• Envelope Times
Minimum rise or fall time: ~62us (8kHz max frequency)
•
Maximum rise or fall time: >150sec (typically 250-300sec 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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