Hello, I'm a musician who has access to an iMac G4 with Garageband. I plan to start writing music on the Mac, and am enthusiastic about Garageband's apparent ease of use. I am trained in music, but have never written on a computer. Initially, I want to write simple dance music without the necessity to 'play' all parts myself. Ideally, I would like to be able to record a 'sound' and then use software to compose a melody using that sound. I have read a little about Garageband, but I am not sure if this is possible with this software. Is it possible? Or would another program be more suitable, bearing in mind that I am a complete beginner at electronic music. Can someone advise me?