03-21-2023, 03:16 AM
I have a MA12070P amp board that is logically identical to the official Merus/Infineon amp hat. I can connect it directly to the RPi GPIO and it works with the Merus overlay and all settings are available through alsamixer. However, there are still the usual I2S limitations from the RPi (doesn't support full sample rate/less than desirable clocking -- these are hardware issues with the hat and RPi). To get around these limitations, I have a SA9227 USB->I2S board that I have had success with using a microcontroller for enable, mute, and I2C signals to change the MA12070P settings manually.
However, what I would like to be able to do is use the Merus overlay for controlling the amp board over RPi GPIO and alsamixer while using the USB board as the I2S source. Is this something that is even possible?
Barring this, any other suggestions?
Thanks,
Nathan
PS -- having used a Merus hat for a while now, using the SA9227 with quality clocks and 192/24 has been a massive upgrade in sound. Gorgeous!
However, what I would like to be able to do is use the Merus overlay for controlling the amp board over RPi GPIO and alsamixer while using the USB board as the I2S source. Is this something that is even possible?
Barring this, any other suggestions?
Thanks,
Nathan
PS -- having used a Merus hat for a while now, using the SA9227 with quality clocks and 192/24 has been a massive upgrade in sound. Gorgeous!
