Mac help

[theatokos]

My mac has a built in microphone. I thought I'd record myself singing and post it for fun. But, like an idiot, I deleted Garage Band (I wanted to know if I could get rid of applications that came with the computer). I thought it was a game and surely I'd never use it. Adam now tells me it's the basic recording application. I went to the Mac site and tried to down load it, but my computer tells me it can't find the appropriate application.

Can anyone help me get it back? I already emptied the trash a few days ago, so it's not recoverable from there.

Silly me.