Hidden away in The Keyboard section of the Sound Browser, Garageband’s Sampler is a surprisingly powerful way to capture, edit and playback pretty much any sound you can think of.
GarageBand’s Sampler looks very similar to a lot of its other keyboard based touch instruments. You have the section up top where all the action happens, and a playable keyboard in the bottom half.
In the video below I show how to sample a variety of different sounds and demonstrate how to shape and edit those sounds into a full project.