Blade 14 distorted audio

Hello,

Have noticed a clipping type of sound, a bit like a bitcrushing sound on top of the audio coming out of my Blade 14 (2017-7700 1060gtx). I am not sure if it has always done this as I used to use an external audio interface.

I've tried changing, reverting back to old drivers etc, disabling different devices with no luck. It's particularly audible on sounds with bass. It sounds like a sample rate issue, tried many combinations of 16/24bit 44.1-48khz etc. Exclusive control on and off, windows hd driver, the realtek driver....

Occasionally the volume also goes to max or minimum by itself, and the volume display bar remains on the screen.

Any help and solutions much appreciated :)

Thanks