No Audio on Nexus 6p

I have a nexus 6p running the latest beta of Android N. Last night I started getting strange popping sounds from the speaker which I've never experienced before.

This morning I almost missed an appointment because the alarm didn't play. I checked the volume and while I can adjust all the volume bars, they turn to a grey shade of blue after I set them instead of the usual brighter color (I can't remember if this is normal behaviour). So I'm getting no sound from any apps. When I try to play music from Google Play I get a failed to play at this time, YouTube does the same thing. It's not a video issue though because I can still watch things on vlc, they just have no sound.

I would think it's a problem with the beta but I've been running it for months with no problem like this so I'm reluctant to wipe and start over back on M without knowing its the issue. I haven't seen this reported as a bug anywhere else. If it's not an issue with the beta though what could it be? It's as if the audio module is crashing... No amount of rebooting is making a difference either.