Well now forced to stay indoors and my pit I can do some R&D work so first project is a volume control using optics. It will allow us to have any value and multi channel pots at any pre-fixed value i.e. 10R-1000MR and either Log/Anti Log or Linear well any curve you want basically. The track sliding noise will go away and matching can be between 20% to 0.01%. It can also be driven with a voltage reference or a R2 Ladder. The ref/control voltage will be set to 1.00V to 5.00V but with a simple attenuation network this could also be changed. Pre-set lower and upper limit can also be set i.e. 158R Min to 1099R Max The pot will have upper and lower BW limits 1Hz - 400KHz but special can be made.
PCB for this unit will be available from me or ABCaudio. The unit can also be master slave configuration. For mixer and motor control references.