mixed channels

Hello dears!
In Volumio a newbie, so can’t understand the problem. And the problem is this: when listening to test files to test audio equipment found that I have mixed channels (left and right swapped), what could be the matter and whether it is possible to fix it somewhere? Another question - I have a fiio Q1 MkII DAC, it has an indicator that should light up when a DSD signal is received on it, but for some reason this does not happen (DSD direct mode is enabled in the settings). Configuration: Raspberry Pi 3 B+, Volumio: 2.526. Please help to understand.
Forgive my English - I use machine translation.
Sincerely, Denis.