GarageBand - Using the Piano
The best way to learn the GarageBand interface is to experiment with it and try different things. Thus, we will use a couple of examples throughout this article, teaching you how to do some basic things with GarageBand.
To get started, open up GarageBand and select Create New Music Project. Type in a name for your song and click the Create button. Do not worry about the tempo, signature, and key for right now.
Upon launching GarageBand, you should have a pretty blank screen. If you look to the left side of the GarageBand window, you should see Grand Piano listed under the Tracks section, and a Mixer directly to the right of Grand Piano. There should also be an on-screen keyboard visible.
So, let's get started with that. You can use the on-screen keyboard to play notes. However, it is not by any means a reasonable alternative to an actual piano. You can hookup a keyboard to GarageBand and record that way, but that's a whole different thing. For the most part, this on-screen piano is used to create backgrounds for vocals, beats, and customize existing loops. Click the A icon on the keyboard. It should turn into a bigger keyboard, containing fewer keys. Now, the keyboard can be played with the keys on your actual computer keyboard. Each key on the on-screen piano is labeled with a corresponding key to the computer keyboard. For example, the C-note of the on screen keyboard can be played by pressing the A key on your Mac's keyboard.