09-15-2023, 09:39 AM
@DRONE7 I never said that the MCLK is present:-)
But the Protodac of the OP doens't require a MCLK, just like some other DAC (like external I2S DDDAC 1794).
The Pi + Protodac combination works, only then the I2S master clock of the Pi is used.
We only use the hifiberry to improve the performance of the clock by making the Pi I2S a slave to the hifiberry I2S master clock.
But you are right if you would use a different I2S DAC that requires MCLK; there is no MCLK available is that case and it will not work.
But the Protodac of the OP doens't require a MCLK, just like some other DAC (like external I2S DDDAC 1794).
The Pi + Protodac combination works, only then the I2S master clock of the Pi is used.
We only use the hifiberry to improve the performance of the clock by making the Pi I2S a slave to the hifiberry I2S master clock.
But you are right if you would use a different I2S DAC that requires MCLK; there is no MCLK available is that case and it will not work.
