Recommended Codec?

[mkarliner]

Hi and thanks for this library!
Could you tell me what codecs you've tested this with or would recommend?
I'm currently playing with the Teensy Audio Adapter, which has a sgtl5000 on board.
The sgtl5000 is a bit of a beast and the only library I can see for it is PRJC's C++ Arduino
library which would need some massaging.

The goal is to make an add-on board for the Pico which would have a bi-directional i2s
codec on board.

[malacalypse]

I2S is a standard. This works with any I2S codec. Whether or not your codec needs additional configuration using other methods (e.g. I2C) to put it into I2S mode and set it up for the right pins, clocks, speed, etc. is another story. None of that for any codec is done by this library. But once you put the codec in I2S compatible mode, this library should handle the audio streams to and from the RP2040 for any of them.

[mkarliner]

Understood. I was just wondering what codec's you have used with this code.

[malacalypse]

More than I can easily enumerate. TIs (many series). Wolfsons/Cirrus. ESSs. Pick any decent codec. I like the PCM3060 for a solid bidirectional codec that's got superb specs and doesn't break the bank.

[mkarliner]

Thank you muchly.
The SGTL has a potential problem in that the output uses a virtual ground which
will give problems with standard PC headset which have a common mic/speaker ground.

[malacalypse]

Use a single-ended output amplifier topology with the PCM3060 then (there's an example in the datasheet) and you shouldn't have any trouble with that, then. The OPA4388 is a nice opamp for that purpose.