...
+ indicates a good point of the design
- indicates a bad point in the design
Learnability:
+ Easy to place notes on the staff; very interactive interface
+ Easy to edit notes’ characteristics (apply accidental, make longer, tie together, add expressive marking)
+ App plays the note’s pitch as it is placed, teaching the user how precise they need to be when clicking the staff
- In Edit mode, it isn’t obvious that clicking on the key signature, time signature, tempo, and clef bring up menus to change those features. A user might think that they have to start over.
- Not obvious that clicking the phone’s menu button will toggle between Playback and Edit modes
- No obvious way to delete a file that a user no longer wants. This could easily be implemented using the phone’s menu button on the Menu screen.
Efficiency:
+ Can easily place notes of the same value in a row
+ Program automatically draws measure bars
- The loading screen may be unnecessary, depending on how quickly the app can load the list of files it has stored.
- As currently designed, the staff may be too small to accurately place notes
Safety:
- There is a risk of mode errors in the Playback and Edit modes because their basic design looks very similar.
+ The differences in the buttons (and the lack of the buttons the user would want if they were trying to do something in the wrong mode) is a clear indication that the user is in the wrong mode and they could easily toggle to the desired mode.
+ Cancel button lets a user go back to the Menu screen if they accidentally create a new sketch