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1. A note on parts
We recommend 4.7k to 5.1k for the offset resistors. The amount of gain and inversion will vary
depending on the tolerance of these parts and the potentiometers intalled. 5.1k will ensure a
tiny amount of attenuation at full CW of the controls. 4.7k will give a slight signal gain at full CW
and 4.99k should provide an approximately 0db gain at full CW. You can use other values to
obtain varying responses from the controls.
You can even use different values for each channel to give you a versatile solution for
experimentation during patches.
10k Linear pots are recommended to get the 0 output at the center of the pot travel. You can
also use log/audio pots if you have them and the response will be slightly biased towards
inversion so that there will be more range on the CCW side of center than the CW side. You can
use 100k pots to obtain gain at CW rotation and a small amount of inversion at the CCW
position.
Feel free to experiment but use small amounts of solder so that you can make changes if
necessary until finalizing your desired component values.
2. Board preparation
Apply flux to the SMD pads. Tin one pad of each SMD footprint with a SMALL amount of solder.
For the ICs, apply a tiny amount of solder to two opposite corner pins.
