So when I set an audio looping task for my students recently I had to start looking around for alternatives for those who don't use BYOD Macs. And I found it in AudioTool, a powerful, sophisticated, free audio editor that runs entirely in Chrome. Yes, that's right. In Chrome.
Here's a little rhythm track I knocked together on my first attempt. I think this has LOTS of potential in the classroom.
And here is a screen grab of the editor...
Best of all, the tracks you create are all built on Creative Commons licences by default, so it supports remixing and open sharing really well. Build on the work of others and let others build on the work of yours. Love it!