I've noticed that many of the sound effects seem to be triggering multiple times. This includes jumping, the announcer voice (SUUUUPER MEAT BOY!!!), saws, and just about everything.
The thing that makes this really stick out is the inconsistency; sometimes it happens, sometimes it doesn't.
I recorded a video to show off this issue. Normal Meat Boy sounds a little too squishy so I decided to play a retro level where the sound effects are short, clear, and the issue is easy to notice.
Check it out: https://youtu.be/hGMokbw58jQ