Sound is distorted when on play mode

Hi Everyone,

I've been stuck on this one for a while. I have a sound file I'm playing when the user loses a game. The usual trombon "failure" sound. It's an MP3 file like the rest of my audio files, I don't know why but when this specific sound plays, it sounds really distorted and even though I'm using:

source.PlayOneShot(loose, 0.7F);

it keeps playing like a loop (loop option is disabled on the audio source).

I've tried changing doppler and pan level to 0 already. Any other ideas about what could be happening?

Thanks
Fabiana