I was just about to tell you, that I found the same thing. Different sampling frequency and bitrate. Can you check with this new music file?
https://mega.nz/file/DHhz3IrJ#wNdYUSvLYG_rS4CcFwcjtRuFh_gYQ55eMtgu80qvpKs
Edit: Btw, I'm currently working on giving the new tommygun zooming function, like for the sniper. I have successfully made it able to zoom, by taking every zooming related function that specifies the sniper rifle being held and adding the tommygun to it. But now I somehow broke the ability to change zooming amount with the scroll wheel. Any idea?
Edit2: Here is the player entity file, so you can check yourself. https://mega.nz/file/ybBjWBaI#pTBYBJYIM2GBUigiKG_ruNa1PTDiVc02dtuefI6bhJk