I set the 7511 up for SPDIF once and most of the frequencies I inject with a test set work fine and I hear good audio tone. But, when I inject 176.4khz or 192Khz SPDIF I get a bad, noisy tone
I noticed the main register map offset (0x04) “SPDIF Sampling Frequency” moves around a lot when injecting 176.4khz or 192Khz. The read values change every time on every read at those frequencies. The register reports correctly with good audio with injected SPDIF sample rates of 44.1,48,32,88.2 and 96.
The audio is on 1080p video so there shouldn’t be a problem with speed but the fact that my reads to that register offset (0x04) are moving around in values when I am at 176.4 and 192.0 makes me feel maybe something isn’t quite right in the 7511. Probably something I haven’t setup properly but I was wondering if you have any ideas.
I2c Writes to the adv7511 Registers:
0xc = 1 // i2c select sampling freq.
MCLK is internal,
Question: Is there an errata on this setup or am i missing a configuration setting?