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Hi there, good question, I would also like to know…
I have two RPIs with Max2Play – and on both I have the setting „Disable Build-In-Audio on RPI3“ activated)
1. RPI3 with IQaudIO Pi-DAC+
Here I used -o hw:0 -V Digital and it seems to have worked. Should I use „Master“ instead of „Digital“?
2. Audiophonics RaspDAC with I-Sabre V3 DAC ES9023 TCXO
Here I also used -o hw:0 -V Digital – this card uses the Hifiberry DAC (not DAC+!) I2S driver, and supposedly has no hardware volume controls. I believe the setting made a difference, does that make any sense?
@ Thomas – check this out to set max volume 96%: https://support.hifiberry.com/hc/en-us/articles/205385241-Mixer-controls-on-the-HiFiBerry-boards.
But that does not work for my I-Sabre… alsamixer says no volume control.
Any help or comments?