Linear/Exponential VCA
I’ve been playing around with Softube Modular recently (can’t afford a real rack 
) and the Doepfer A-132-3 module included has 2 linear/exponential VCAs. I found the layout and linear/exponential switch handy so I thought I would make something similar for Audulus. Rather than modulate the knob directly I’ve included a separate mod input. The gain knob is intended as a static gain. It’s exponential and calibrated in dBs. The static gain goes from -120 to 3dB. The mod input has an attenuator and a switch for linear or exponential response. With the mod attenuator at 50% a mod input of 1 results in unity gain (0 dB) and with the mod attenuator at full, a mod input of 1 results in 2x output (+6 dB)
I/O
| Input |
Signal Range |
Notes |
| in |
audio -1 to 1 or modulation 0 to 1 |
signal to be attenuated or amplified |
| Output |
Signal Range |
Notes |
| out |
0 to +9 dB max |
modulated signal |
Controls
| Control |
Function |
Notes |
| mod |
level control for mod input |
range from 0 - +6dB |
| gain |
`sets the static (no mod input) gain for the module |
-120dB to +6dB |
Displays
| Meter |
Displays |
Notes |
| gain display |
displays static gain in dBs |
|
Version History
Demos
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