So i've had this problem for some time now, and i'm not sure why it happens. Basically when i make a custom sound for the Heavy's stock minigun (rev up sound, shooting, crit shooting, ect.) It doesn't work in-game, it's just silence. It's not just the sounds i make, because i downloaded another custom sound from GameBanana and the same thing happens, silence. So, does anyone know why this happens and how can i fix it? Thanks.
TL;DR Custom sounds for the minigun don't work, i need help.