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Shaped Dual EnvVCA

4ms Company

User Manual 1.0 – November 15, 2022

The Shaped Dual EnvVCA is a dual analog envelope generator, waveshaper, slew limiter, and VCA.

Each of the two channels is identical and they can be used separately or together.

Shaped Dual EnvVCA features:

•

Versatile linear, exponential, and logarithmic envelope generator/LFO

•

Low-noise, low-distortion, DC-coupled linear VCAs

•

Shape slider, CV jack and attenuverters for fading between Exponential, Linear, and Logarithmic

envelope shapes without changing envelope timing

•

100% analog

•

Sliders and range switches control Rise and Fall times from ~2ms (500Hz) to ~2 min.

•

Time CV jack extends time range: ~400µs (2.5kHz) to ~1 hour.

•

Independent attenuverters for Rise and Fall time

•

Blue/Red lights indicate strength and polarity

• Cycle buttons for looping envelopes (LFO)

• Trigger input jack and switch for toggling between AR, ASR, and Cycle modes of triggering

•

EOR/F (End of Rise/Fall) gate outputs can be used to chain and sequence events

• Env Level and Offset knobs scale and shift ENV output without changing VCA volume

• Audio In and Out jacks for passing audio or CV through the VCA

• VCA CV inputs to use VCAs independently from the envelopes

•

VCA gain internally connected to envelope output when VCA CV jack is left unpatched

• Follow input jacks allow for slew limiting, envelope following/sidechaining, ADSR, and exotic

filtering effects

• Re-trig jumpers allow for re-triggering during rise phase

Cycle

ASR

Cycle

ASR

Rise

Fall

Shaped Dual EnvVCA

TimeTime

VCA CVVCA CV

Audio BAudio A

Out

Lin 5VLin 5V

Shape

Rise Fall

Slow

Fast

Med

Slow

Fast

Trig

Cycle

Offset

Level

EOF

Fall

Rise

Shape

ENV A ENV B

Shape

FallRise

Slow

Fast

Med

Slow

Fast

Trig

Cycle

Offset

Level

EOR

 Table of Contents 
Setting up your Shaped Dual EnvVCA! "...................................................................3
Controls and Jacks! "................................................................................................3
Rise and Fall Time Ranges! "....................................................................................6
Patch: Making Notes! ".............................................................................................7
Making Notes (basic)! ".......................................................................................7
Making Notes in Stereo! "...................................................................................7
Synchronizing channels: Making Notes Using Triggers! "...................................8
Creating Stereo Motion! "....................................................................................8
Using a Keyboard or Sequencer! "......................................................................9
Patch: Waveshaping! "............................................................................................10
Modulating Waveshape! ".................................................................................10
Different Waveshapes for Rise and Fall! "...............................................................11
Log Rise with Expo Fall! ".................................................................................11
Any Combination of Shapes! "..........................................................................11
Patch: Modulating Time! ".......................................................................................12
Rapid Bursts! "..................................................................................................12
Ratcheting! "......................................................................................................12
Patch: Making an Oscillator and Synth Drums! "....................................................13
Making an Oscillator! "......................................................................................13
Making a Kick Drum! ".......................................................................................13
Making other Synth Drum sounds! ".................................................................14
Self-patching ideas! "..............................................................................................15
Frequency Modulation (FM)! "...........................................................................15
Chaotic FM! "....................................................................................................15
Utility Patches! "......................................................................................................15
Attenuator! "......................................................................................................15
Trigger Delay with Pulse Width control! "..........................................................15
Inverted Trigger Delay (With Pulse Width Control)! ".........................................15
DC generator (Manual CV)! ".............................................................................15
Creating Envelopes with Trig Jack and Switch, Cycle Button, and Follow Jack! ".16
Triggering with switch set to AR! "....................................................................16
Triggering with switch set to ASR! "..................................................................16
Triggering with RETRIG Jumper Off (Factory Default)! "...................................16
Triggering with RETRIG Jumper On! "...............................................................16
Cycle Button and Triggering with switch set to Cycle! "...................................16
Follow Jack with Gates! "..................................................................................17
Fundamentals of the Follow Jack! "........................................................................17
Audio filter! "......................................................................................................18
Portamento/glide! "...........................................................................................18
Sidechaining (Envelope Following)! "................................................................18
Using non-linear Shapes with Follow! "............................................................19
Creating ADSR Envelopes! "...................................................................................20
ADSR envelope! "..............................................................................................20
Table of Envelope Shapes! "...................................................................................22
Using Offset and Level Knobs! ".............................................................................23
RETRIG Jumper! "...................................................................................................23
Electrical and Mechanical Specifications!............................................................24
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