Here's an in-depth view of how to create your own loops in GarageBand "live-loops" mode - it's immensely powerful and useful in creating tunes where you need a more riff-based approach to your tunes.
Here's I use guitar and bass and vocals to create riffs that you can then use to piece together a song.
Enjoy and Share!
Follow up video is here (as of 18/2/19), where I create a tune using GarageBand track view for pre-production of more complex loops, strings, drums, etc.
https://youtu.be/8hiSNXX0JZo
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