I believe that this sequence contains I2C writes to amplifier chips. It would be really helpful, if Realtek can provide more information for the I2C master interface for their codecs (describe basic I2C I/O).
The biggest problem is to figure what address/value pairs to write with I2C into the amplifiers, and here the catch is that those I2C/I2S amplifiers may or may not be sourced from Realtek, and it'd be difficult for Realtek to provide documentation on their competition, wouldn't it?
Sure, that's another problem. But currently it's not clear even how to communicate via I2C/whatever to the underlying chip, as it's done via the vendor-specific COEF verb. At least this could be opened, I hope.
The nice thing if we know the I2C master communication is that we can create I2C bus in the HDA driver and do run i2cdetect to detect the connected chips. Yes, it's partial information, but it's far more better than this unreadable coef implementation.
Ah yes, now I see the idea. Very interesting indeed. It would help quite a bit if we can detect the devices and then go back to the OEMs to ask "can you give us the commands for device #42". In the absence of information, it would help filter the sequences extracted with scripts.