05-27-2020, 01:42 AM
The audio interfaces are different for your two DAC's and so results can be different.
The USB DAC will be using the universal Linux USB audio driver and its "Quirks" file that contains definitions of USB DAC's and their custom requirements. Your DAC is prolly in the Quirks file and its correctly reporting its max sample rate of 192K.
The I2S DAC has its own custom driver and so more likely to not cause issues.
Also, ALSA will always try to provide the bit depth that the audio device accepts. it zero-pad's it so no loss of bit-perfect-ness. This all happens behind the scenes.
What exactly are you trying to achieve with regard to resampling and your two DAC's?
The USB DAC will be using the universal Linux USB audio driver and its "Quirks" file that contains definitions of USB DAC's and their custom requirements. Your DAC is prolly in the Quirks file and its correctly reporting its max sample rate of 192K.
The I2S DAC has its own custom driver and so more likely to not cause issues.
Also, ALSA will always try to provide the bit depth that the audio device accepts. it zero-pad's it so no loss of bit-perfect-ness. This all happens behind the scenes.
What exactly are you trying to achieve with regard to resampling and your two DAC's?
