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Hi Blakaddr,, sorry, I was only trying to get people to think, apparently I missed some parts looking over the schematic.

The IRU LDO specifies an output capacitor with a minimum of 10uF, the text...

It looks like you have a nice project going on there, nice video's on youtube....

In the schematic I see failrly low values of capacitors on the outputs of the voltage regulators, specially the...

If you feel you hear digital noise it is not so very much important what voltage regulator you are using. It is more important to run the audio circuitry from a different voltage regulator than the...

I guess I would start by disconnecting 3v3 of the teensy to the audioboard bit power the audioboard from a separate 3v3 regulator.

The audioboard is designed to connect directly to the teensy, but...