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1) We test all the boards, so both oscillator worked before shipping.
When the FIFO does not recognize the master clock it depends on the oscillator.
Please, try switching of and on the oscillator, and after a minute or so light on the FIFO.
2) The FIFO settings look correct. Have you saved them in the EEPROM as for User manua instructions?
If so the I2S output should be correct on the pisn I have previous listed.
TWSAFB-TX HDMI connection in the attached picture, the same of PS Audio standard (attached).
Have you an oscilloscope?
Without an oscilloscope the remote debugging is difficult.