So a while back I wanted to automate a guitar pedal with 5 pots. I was told that an actual digital pot chip is too noisy for an audio circuit. Also using optoisolation was really difficult, I never got it working right. I ended up giving up.
Has anyone done this? Is there a well documented way of doing it?
As for that chip, I know it says "audio" but I think that refers to the log taper. I actually want a linear taper. Does the word "audio" refer to the taper, or to it's ability to be used in audio applications? I mean I know it's a log taper but does that necessarily mean it is suited for audio applications?
Oh sorry, also the first issue I ran into was that my circuit uses 9v. So the digipot would need to be suited for that.
Pretty expensive for just one channel. It's got the higher voltage but totally overkill on the resolution. Plus is doesn't seem to be suited for audio circuits which was one of my first issues above.
I'm afraid I might just have to figure out how to get the optoisolators working the way I need.