Pretty cool idea. It would be a more open competitor to Apple's GarageBand music teaching features. I think your idea of adding more value to the site would be

Pretty cool idea. It would be a more open competitor to Apple's GarageBand music teaching features. I think your idea of adding more value to the site would be a good one. Apple has quality and integration with a nice music creation software. Perhaps you could include more information from lyric sites and guitar tabs and sheet music as you noted.