hughpyle/teensy-i2s

Needs to support non-I2S modes

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For multi-channel codecs, the library should support "DSP mode" (aka "TDM") instead of classic I2S. To do this will probably need special-case frame setup, and should just assume that anything with more than 2 channels uses DSP-mode.

Test against one of: WM8580/81 (lots of outs!), PCM3168A, CS4244, etc.