Dacs don’t usually have a standard volume mapping, so 16% on yours could be 25% for mine, for example. In any case though you most likely are fine, unless it sounds uncomfortably loud at any point.

A simple test is ‘If something at 0dBa is too loud for you to comfortably listen to then you might want to reduce the volume until it is’

You may also need different volume settings for different music