So someone else in the past had mentioned this as an issue. But idk if anyones actually looked into it. Anytime I try to upload any type of sound onto a kiai or a hitsound, it gives a very annoying static buzz sound toward the end of the sound. It doesn't have the sound when on the forum when played in inventory - only in game.

Any help is appreciated with this.

Hi, try uploading your sounds with 44.1kHz sample rate.
5.65 got an update to better support 48kHz wav sounds but apparently there's still something broken in SDL_Mixer library that we use so it doesn't always play those correctly.