I thnk the background static has been going on for a while, I’ve been ignoring it like tinatus 😉
Today though, I had had enough, and needed to find a solution.
One quickk search later I found the cause, on some update the mic’s had been activated in Alsamixer, a couple of clicks later, all sorted, clear sound restored 🙂
Ask Ubuntu: Constant noise in speakers and headphones
The most probable cause of constant noise coming in from the speakers is usually mic boost. In order to disable this:
Open a terminal.
Type alsamixer and press Enter.
Reduce the Mic Boost and Internal Mic Boost to zero. Refer to screenshot.