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Noise occurs at sampling frequencies of 176.4 kHz and 192 kHz.

Thread Summary

The user experiences noisy audio output from the ADV7511 at 176.4 kHz and 192 kHz sampling frequencies, with incorrect N and CTS values. The final answer suggests checking the configuration of specific registers in the ADV7511 according to the sample rate, as detailed in the ADV7511W Programming Guide.
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Category: Hardware
Product Number: ADV7511

As shown in the diagram, I built a circuit combining the ADV7511 and ADV7619.

The audio format between the ADV7619 and the ADV7511 is SPDIF.

When the sampling frequency is set to 176.4 kHz or 192 kHz, the audio output from the ADV7511 becomes noisy. At that time, the N and CTS values are incorrect.

・192 kHz (Normal)
N = 24576
CTS = 148500

・192 kHz (Noise from ADV7511 output)
N = 6144
CTS = 37124

What should I check?

Best regards.