Use case: Set Up Ambient Music Performance

Characteristic Information

• Goal in context: User sets up an ambient music performance, but leaves it as background.
• Scope: Global
• Preconditions: Robot Rock is freshly loaded and is in its initial state.
• Success end condition: User has an unobtrusive aural soundscape they are content to leave as background music.
• Failed end condition: User cannot produce the sound they are looking for and give up.
• Primary actor: Robot Rock user
• Trigger: User

Main Success Scenario

1. User adds an instrument: Ambient Synth
2. User drags the instrument to the lower left corner for a relaxed, sparse performance.
3. User adds another AmbientSynth to the ensemble and places it in a similar location.
4. User reduces tempo to 80 bpm.
5. User adds and drags 2 more AmbientSynths, which collaborate to produce mellow, soothing textures.
6. The User approves of the performance, and leaves Robot Rock on while working on other tasks.

Extensions

1. User adds a form of gentle percussion, such as wind chimes.
2. User adjusts volume or key.
3. User uses anywhere from 2-10 different Synths.

Variations

1. User ignores tempo of master track.

Related Information

• Priority: High
• Superordinate use case: None
• Subordinate use cases: UseCase_AddInstrumentToEnsemble.
• Secondary actors: Instrument panel, ensemble space

Schedule

• Due date: Beta release

Open issues

• How do we assure variation of limited harmonic instruments of this nature?
• Should the instruments ever play chords? Why or why not?