Apple's Mainstage is an awesome deal!!! For $29 bucks you get an incredible assortment of cool instruments and loops! Playing around with Apple's Mainstage is a blast!
Now since this is a blog for tips on Garageband, you might be wondering how you can use Apple's Mainstage with Garageband?!
The key is to get SOUNDFLOWER, which is a free mac audio plugin that let's you route audio from mainstage output to garageband input!!
This combination gives you incredible sound module for Garageband!!
Give it a try!