A new version has just been released, Iv'e been using the beta version for the last weeks and the new features are really impressive:
https://aurallysound.com/pages/release-notes-proSimply put, it's the perfect transcribing assistant and song learning app out there.
John, the developer, is also very open minded to new suggestions and appreciates bug reports. In fact, several of the ideas on this thread (and many more) have been implemented on the new version.