To @the jew hunter
hunter--your troubleshooting skills are similar to mine--poke around--and then some. Poking is especially is especially handy when the problems are physical.
Clever "replaced but don't know if it was new."
Good luck in your investigation.
I know the headphone jack itself can be problematic, something in the design that can allow just a tiny displacement of the plug to result in disconnection, don't know if purchasable replacements are better or not, however that is probably completely unrelated to your sound issues. Yet..., I would look at that component first.
I am glad you will post results.
, you can see from this thread that it is probably hardware, as no one else has found or mentioned any software-caused issues or fixes.
Amaze 4G Unlocked Rooted S-off (Juopunutbear) SuperCID 4EXT CM10
This is not haiku.
Nor does it profess to be.
Android in Springtime.