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Can anyone suggest a good DigiPot for audio?
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Can anyone suggest a good DigiPot for audio?

by maxhirez on Thu Jun 13, 2019 11:42 am

I've been futzing with MCP4131/41100/42100 pots on Arduino but running an audio signal through any of them always results in popping. I also tried a DS1803 on the understanding that it waited for a Zero crossing to let a change to the wiper position through but I can't seem to get any of the available tutorial circuits/sketches to even run a simple LED fade. Does AF have any supported digital potentiometers that would be appropriate for audio?

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Re: Can anyone suggest a good DigiPot for audio?

by adafruit_support_mike on Sat Jun 15, 2019 7:13 pm

The pop will be the result of sudden changes in the output. Are you changing the pot's setting from one value to another immediately, or ramping through the values in small steps?

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Re: Can anyone suggest a good DigiPot for audio?

by maxhirez on Sat Jun 15, 2019 11:29 pm

Ramping. I'm trying to build a panner and eventually a quadraphonic spatial sequencer/mixer for eurorack style synths, so a LFO/other control signal would be read by an analog input in the first case and in the second I have (planned) an ILI9341 setting 8 separate digipots based on a 16 step sequence drawn on the screen or a selected program per channel.

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Please be positive and constructive with your questions and comments.