[SOLVED] Variable USB output level with different DACs

[agent_kith]

Is there anything in Snakeoil OS that could cause one DAC but not another to interpret the signal as being lower in volume?

What player are you using? LMS+Squeezelite and MPD all exhibit the same issue?

SSH into your machine, and run "sudo alsamixer", make sure all volume controls are set to max. Depending on audio cards, that could be > 1, e.g. one for digital one for analog, and another for both (usually called main).