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From the homepage, Silas has the option to look at his existing library of compositions, or to create a new composition. Here he selects the "New" button, and is directed to the "New Composition" page. 
Musical Sketches supports composing music through drawing notes onto a sheet, or through transcription of audio. Since Silas is already whistling this tune, he is able to select "Record" and is directed to the "New Recording" page.
, or in landscape: 
Here Silas is presented with a split screen, where on one half he controls the recording mode and on the other half he can view and edit the notes as they are recorded.
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Playback occurs through the native speakers or headphones on the Android device, and the sliding dashed bar indicates where in the score is being played. In the "edit" page, Silas has the same options as when editing occurs during the recording phase.
Workflow Design Analysis:
+ indicates a good point of the design
- indicates a bad point in the design
Learnability:
+ The interface is extremely simplified (not cluttered), giving the user very few options and making paths obvious.
+ Buttons are familiar (Play, Pause, Seek, Record)
+ Succinct instructions for adjusting note length and pitch make otherwise hidden actions appear more obvious.
- No way to delete a recording.
- Not obvious to user how to switch from synthesized notes to actual recording of the user (if composition was created by recording).
Efficiency:
+ Large buttons with clear, non-ambiguous meanings.
+ "Home" button always remains in same location
- Editing while recording can be cumbersome to switch between actively recording and editing, and then back.
Safety:
+ No composition is "static" (it can always be edited later).
+ User can always leave the application and it will save the current state.
- No composition is "static". Perhaps a "lock" button can be instituted later.