4ms EnvVCA Bedienungsanleitung


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EnvVCA
4ms Company
User Manual 1.0 – October 30, 2022
The EnvVCA is an analog envelope generator, slew limiter, and VCA.
EnvVCA features:
•Versatile linear envelope generator/LFO
•Low-noise, low-distortion, DC-coupled exponential VCA
•100% analog
•Sliders, switches and Time CV jack control Rise and Fall times
•100 s (10kHz) to over 30 minutes µ
•With sliders and switches only: ~1.25ms (800Hz) 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
Table of Contents
Setting up your EnvVCA
1. Power off your Eurorack system.
2. On the back of the EnvVCA you will see a 10-pin header. The 10-pin
header connects to a Eurorack power header using the included
power cable. Connect the 16-pin end of the power cable to a 16-pin
Eurorack power header on your power supply distribution board and
the 10-pin end to the with the red stripe on the power cable EnvVCA
oriented towards the bottom of the module.
3. Using the included screws, securely attach the EnvVCA to the rails
of your case.
4. Power on your Eurorack system.
Note: The EnvVCA is reverse-polarity protected, but incorrectly
connecting any module in any system can damage other modules on
the power bus.
Setting up your EnvVCA! "........................................................................................2
Controls and Jacks! "................................................................................................3
Patch: Making Notes! ".............................................................................................5
Making Notes (basic)! ".......................................................................................5
Making Notes Using External Triggers! ".............................................................5
Patch: Ratcheting! "..................................................................................................6
Ratcheting! "........................................................................................................6
Advanced Ratcheting! ".......................................................................................6
Rise and Fall Time Ranges! "....................................................................................7
Creating Envelopes (Trigger, Cycle, Follow)! "...........................................................7
Triggering with RETRIG Jumper Off (Factory Default)! ".....................................7
Triggering with RETRIG Jumper On! ".................................................................7
Cycle Button/Jack! "...........................................................................................8
Follow Jack with Gates! "....................................................................................8
Fundamentals of the Follow Jack! "..........................................................................9
Creating ASR and ADSR Envelopes! "......................................................................9
ASR envelope! "..................................................................................................9
ADSR envelope! "..............................................................................................10
Audio filter! "......................................................................................................11
Portamento/glide! "...........................................................................................11
Generating Exponential and Logarithmic Envelopes! "...........................................11
RETRIG Jumper! "...................................................................................................12
VCA Min Gain Trim pot! "........................................................................................12
Electrical and Mechanical Specifications!............................................................12
Page of 2 12
Controls and Jacks
Cycle Button and Cycle Jack
The Cycle button toggles the cycling state. When cycling, the behaves EnvVCA
like an LFO, with an output waveform that continuously rises and falls. The
button illuminates orange to indicate the module is cycling. Note that pressing
this button does not reset or alter an envelope that’s already rising or falling.
The button Cycle jack toggles the cycle state using a gate source. If the Cycle
is off, a given gate signal will initiate cycling for as long as the gate is held high.
If the Cycle button is on, then the functionality is inverse and the gate signal will
cease any cycling for as long as the gate is held high. See Using the Cycle
Button on page 8 for more information.
Rise/Fall Sliders
The and Rise Fall sliders control the rise and fall times of the envelope. Shifting
a slider up makes the rise or fall portion slower, and down makes it faster.
Each slider has a white light that indicates the current stage and output voltage
of the envelope. When the envelope is in the rise stage, the slider light will Rise
increase in brightness until the envelope hits its maximum. Once the peak is
reached, the light will turn off and the light will turn on, decreasing in Rise Fall
brightness as the envelope falls.
Rise/Fall Switches
The Rise/Fall switches select the overall range of the sliders. Each slider has its
own switch with three positions: Fast, Med, Slow.
When the switch is flipped to , the envelopes go well into the audio range, Fast
allowing for classic AM, FM, and other fast modulation effects.
The middle position ( ) is designed for typical musical tempos, and can be Med
useful when using the VCA to make notes at common BPMs.
The Slow position is geared for gradual fades and other slow LFO-style
modulations.
See the Rise and Fall Time Ranges chart on page 7 for more information.
Time CV Jack and Rise/Fall CV Knobs
The and Time CV jack modulates the Rise Fall times of the envelope. The jack
feeds two knobs: . Each of these knobs is an attenuverter Rise CV, and Fall CV
(short for “attenuating inverter”) and controls how much the control voltage on
the Time jack will effect either the rise time or the fall time. CV
Turning an attenuverter knob to the right of center means that a positive voltage
on the Time CV jack will lengthen the rise/fall time and a negative voltage will
shorten the rise/fall time.
Turning a knob to the left of center gives the opposite effect, meaning that a
positive voltage on the jack will the the rise/fall time, while a Time CV shorten
negative voltage will these durations. lengthen
The farther you turn the knob from center in either direction, the more effect
incoming CV will have. When the knob is centered, the signal on the Time CV
jack will have no effect on the rise or fall time.
Next to each knob is a light which indicates the strength and polarity of the
modulation. The light will turn blue when the rise or fall time is being lengthened
by CV, and red when the time is being shortened. The brighter the light, the
more of an effect the CV is having. When the light is off, the jack has Time CV
no effect on the envelope time.
See Generating Exponential and Logarithmic Shapes on page 11 for more
information.
Page of 3 12
Cycle
Cycle
Rise Fall
Slow
Fast
Fast
Med
Slow


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