GarageBand recording audio cuts out above certain decibel

When recording audio on Garageband, it doesn't record audio above a certain decibel. I've tried resetting controls and I can record audio through the same equipment for other apps with no issues. It's just an issue on GarageBand. I don't know how to fix this. Please help me :(

[Re-Titled by Moderator]

Original Title: Please Help! Garageband recording audio cuts out above certain decibel