Sound is muted and flushed to right channel every time on start-up
I'm not sure when this started happening, but whenever I turn on my macbook air, the sound is muted and flushed to the right channel. This happens even when i shut down the computer with sound on and balanced sound. I still can hear the start-up chime though. I'm using macOS High Sierra, MacBook Air (13-inch, Mid 2012).
MacBook Air 13″, macOS 10.13