Lets see.. 256 bytes per Audioblock write + read, 16MHZ SPI (for cpu @ 96MHZ = 48MHZ F_BUS) = (8 bit * 256 * 2)/16E6 = 0.256ms for one channel, or 2 x 0.256ms stereo theoretical absolute minimum time to transfer (correct?).
Less with faster F_BUS (0.2048ms) and perhaps a little bit more without fifo.
Not too much
Less with faster F_BUS (0.2048ms) and perhaps a little bit more without fifo.
Not too much
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