I think i blew out my speakers?
I was on Garageband, and it said that part of the song could not be played. I can no longer listen to music on my Macbook's speakers, and there are weird noises when i try
I'm just guessing here...
You may have overloaded your audio drivers by playing your Garageband project. There could have been a corrupt file in the project, or maybe what you were playing was just too much for your computer to handle.
Quit Garageband. Shut down your Mac, wait about 60 seconds, then power it on again. That should clear and reset the drivers, and your audio should be okay after that.