we have some interesting discussion last week about connecting the USB interface to some dac that use "right justified" format like PCM1704......
the USB interface is capable to stream RSJ format data in addition to I2S signal.
RSJ (24 bit) data is available from CON3 as per the follow pic,
remember, the data is 24-bit RSJ, that is, it won't work with PCM63, PCM1702 or TDA1541 ........
signal assignment,
DATA_L --> left channel data
DATA_R --> right channel data
LE --> latch enable
BCLK --> bit clock
MCLK --> master clock (usually not used)
connect data left and right to 1704 (left and right) data input.
connect bclk to 1704 bclk input.
connect LE to 1704 wclk input.
