I think Edison is the worst possible idea for recording into a song project. Because then you have to save the file, then open it as an audio clip and put it in the playlist.
Why bother?
Just record into the playlist. Quick and painless and takes two clicks. If you need to slice it around, do it right in the track on the playlist. If you need to REALLY get fancy with the editing, then simply go to the audio clip, right click and hit edit. It'll open edison, then you can make your changes there and save over itself.