This is the version II of the original µVCA.

Features:

• Continuously adjustable curve response (from linear to exponential)
• Gain trimmer (it is possible to get positive gain)
• Dedicated CV attenuators
• Leds for monitoring CV signal

This module was adapted from a design by David G. Dixon

Note that prior to fall 2015 the BIAS and CV knob positions were reversed but their functionality was the same.

Controls

1. CV A
   Sets the amount of attenuation for the CV A input. When fully clockwise the CV input is unattenuated. When fully counter-clockwise the CV input has no effect. The brightness of the LED to the right of the attenuator varies according to the level of the resulting CV.
2. BIAS A
   Sets the initial level of amplifier A before CV is applied. The maximum bias is 5V which provides a gain of 1.
3. EXP-LIN A
   Sets the response curve of amplifier A. Linear when fully counter-clockwise and exponential when fully clockwise.
4. CV B
   Same as CV A but for channel B.
5. BIAS B
   Same as BIAS A but for channel B.
6. EXP-LIN B
   Same as EXP-LIN A but for channel B.

Inputs & Outputs

1. CV A
   Control voltage input for the level of amplifier A. Summed with the BIAS A control. Voltages above 5 V will result in a gain greater than 1.
2. IN A
   Input signal for amplifier A.  This is a direct coupled input so DC or AC signals can be fed here.
3. OUT A
   Output signal for amplifier A.
4. CV B
   Control voltage input for the level of amplifier B. Summer with the BIAS B control. Voltages above 5 V will result in a gain greater than 1.
5. IN B
   Input signal for amplifier B.  This is a direct coupled input so DC or AC signals can be fed here.
6. OUT B
   Output signal for amplifier B.  As of the fall 2015 model OUT A is normalled to be mixed into this output as long as nothing is patched in OUT A.  This means you can use the module as a simple two channel mixer.