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What bus is used to communicate with the sound card? The obvious candidate is USB, but the Pi's USB bandwidth is limited and I don't recall whether USB is available on the pin headers.


If it uses the P5 header, then it's I2C - so there are no USB issues. I remember reading about (other?) Wolfson DACs on Raspi and they were using I2C.


It's actually I2S primarily. I2C would be used for control (volume etc I suppose)


there is no USB on the pin headers, unfortunately (Schematic: http://www.raspberrypi.org/wp-content/uploads/2012/10/Raspbe...)




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