Hello! I’m looking at getting data on a few things about the Audio Expansion Card, but I can’t find a datasheet for the CX31993 (or at least, I haven’t found one during a 20-minute googling session). Is it somehow private or unavailable, or is it contained in another datasheet or something?
Specifically I want to create a 2xAudio expansion card using the CX31993, as I do oscilloscope music and having two headphone jacks playing identical audio without special software would be VERY nice. However, the Audio Expansion Card has a little bit of noise (over 200kHz) that I want to filter out, and I want to figure out if the noise is Class D amplifier noise from the chip and if so, what frequency it runs so I can use a lowpass to filter it out.