MacBook Pro (Retina, 13-inch, Early 2015) audio suddenly terrible
My MacBook Pro (Retina, 13-inch, Early 2015) works fine.
Suddenly this week, the audio is terrible. Really scratchy, sounds like a stereo with the bass turned way too high.
I've tried:
Resetting NVRAM & PRAM by shutting down & starting up holding Option & Command & P & R
Logging in as a guest to confirm it's not an account setting
Tried running sudo killall coreaudiod & restarting
Went into preferences to shift audio balance left & right to see which speaker was the issue: it's the same issue on both.
Any thoughts on how to resolve this? Thank you!