The best way to connect up your mixer and audio interface may depend on factors such as relative quality of mic preamps. Should I connect instruments and mics to mixer inputs and connect mixer outputs to audio interface inputs, or alternatively connect instruments and mics to audio interface inputs, connect audio interface outputs to mixer inputs, and connect mixer outputs back to audio interface inputs? I think both work, but is one 'better' than the other, and if it is, why? This is a basic gear connection question.