Please also check your volume control on the A10. The Manual says:
"7. Volume Knob
Manually adjust the DAC-level volume control. A10 Volume control can be configured or disabled in the Advanced 2 section of the Settings Menu in the Conductor app". It is possible your volume control is not set correctly.
I am not familiar with the Aurender A10 so please double check ALL switches and settings to ensure they are set correctly. Please keep us posted.