worth having a look at the I2S reclock circuit from John Swenson here:
http://audiogestalt.wordpress.com/2007/10/01/transforming-squeezebox-into-high-end-transport/
I know that it is 4 the SB2 and part of the circuit sorts out the different I2S format on the SB2, but could be a good place to start.
I would open up the Duet and have a look, combined with the Duets DAC data sheet and good eyes you should be able to trace most of the wiring for those I2S signals.
http://audiogestalt.wordpress.com/2007/10/01/transforming-squeezebox-into-high-end-transport/
I know that it is 4 the SB2 and part of the circuit sorts out the different I2S format on the SB2, but could be a good place to start.
I would open up the Duet and have a look, combined with the Duets DAC data sheet and good eyes you should be able to trace most of the wiring for those I2S signals.
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