...
- Since users found the top menu bar confusing, we removed one of the buttons and replaced the "Main Menu" button with "Save" and "Exit" buttons.
- We decided that editing individual notes would be done through a modal overlay, so that users could use more of the limited screen space to swipe and drag.
- Audio editors commonly support arbitrarily many tracks, which can be moved around, created, and deleted. Our prototype originally used a scrolling list of tracks, but we users seemed confused by adding and changing tracks. We replaced that with a layers metaphor where there are exactly four tracks , and they're that are overlaid on top of each other on the screensame staff.
- We added small time markings at the top of the editing screen, as suggested by users