How turn on (and make sense of) the LG V30's Quad DAC

The LG V30 may be quite a departure from its predecessors (where's my ticker screen?), but that doesn't mean LG's abandoned all of its more interesting ideas.

Take, for example, the Quad DAC — it's a feature the masses will most probably never pay much attention to (or even know is there), but can be a godsend to those of us who have been burned by other phones' poor audio quality. And thankfully, LG has once again included the feature in its V-series flagship — but this time it's even better.

Unfortunately, this also ...