R507 is in the wrong place

[JordanAceto]

This one isn't a huge deal, but if there is another revision it should be addressed:

R507 goes between the VCA CV generating opamp and the control port of the SSI2162 VCA which attenuates the audio.

BUT it should go between the output of U4B and both of the CV inputs of the SSI2162 sections as shown below.

The job of this resistor is to limit the power dissipated in the SSI2162 at maximum attenuation. The output of U4B shoots positive at max attenuation (which happens with large positive CV signals) and the SSI2162 consumes more current than is necessary.

This is a small problem, and it's ok to leave it as it is for now and build new ones with the current design. Many existing SSI216x designs do not include this resistor. Don't scrap any existing boards because of this, but do change it during the next revision.

[JordanAceto]

Note that there is a recent update to the SSI216x datasheet showing a PNP transistor clamp in this position. Check it out and consider which way to go before updating the board: