First - Thanks very much for this! It's been hard to find documentation so far and this is incredibly helpful.
If I may be so greedy, do you have any other information on how to setup spi vs i2s? I'm working on taking advantage of the i2s features of the module but I can't find any information at all. Your document is a help in the right direction but it seems like even in that spi/i2s is grouped together. Any info on how I can set i2s mode and try pushing audio data to an external dac? thanks again!
edit: a more thorough read of your document (and your spi example) showed (I think) how to get into i2s mode. Thanks again!