Here’s another free tool in the Aviary suite of tools: Roc. It allows you to create short loops and I had blast working with it yesterday. I think the loops you create here can later be added into the Myna audio editor (note to self: check on that).
The interface is built on the idea of dragging tracks to the editing station, where you then click your mouse to add “beats” of that sound to the loop, so you can visually see the sounds you are layering (sort of like a musical cake, but not quite as filling).
Here is what I created:
Peace (in the roc),