Mapping Audio WG Use Cases and Requirements

Revision 3 – 20th February 2012

Requirement Family Requirement Requirement Priority UC 1: Video Chat UC 2: HTML5 game with audio effects, music UC 3: online music production tool UC 4: Online radio broadcast UC 5: writing music on the web UC 6: wavetable synthesis of a virtual music instrument UC 7: Audio / Music Visualization UC 8: UI/DOM Sounds UC-9 : Language learning UC-10 : Podcast on a flight UC-11: DJ music at 125 BPM UC-12 : Soundtrack and sound effects in a video editing tool UC-13 : Recording and Saving Audio Recordings
Use Case Priority High High Low Low Low High High Low Low Low Low Low Low?
Sources of audio Support for primary audio file formats Baseline ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓
One source, many sounds Minority, but important ✓ ✓ ✓ ✓ ✓ ✓
Playing / Looping sources of audio Baseline ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓
Capture of audio from microphone, line in, other inputs Minority, but important ✓ ✓ ✓
Sample-accurate scheduling of playback Minority, but important ✓ ✓ ✓ ✓ ✓
Buffering Minority, but important ✓ ✓ ✓ ✓ ✓
Support for basic polyphony Baseline ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓
Rapid scheduling of many independent sources Minority, but important ✓ ✓ ✓ ✓ ✓
Triggering of audio sources Minority, but important ✓ ✓ ✓ ✓ ✓
Audio quality Baseline ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓
Transformations of sources of audio Modularity of transformations Baseline ✓ ✓ ✓ ✓ ✓ ✓ ✓
Transformation parameter automation Baseline ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓
Gain adjustment Baseline ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓
Simple playback rate adjustment Baseline ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓
Spatialization Minority, but important ✓ ✓ ✓ ✓
Filtering Baseline ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓
Noise gating Minority, but important ✓ ✓ ✓
Dynamic range compression TBD
The simulation of acoustic spaces Minority, but important ✓ ✓ ✓
The simulation of occlusions and obstructions Minority, but important ✓
Source Combination and Interaction Mixing Sources Baseline ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓
Ducking Minority, but important ✓ ✓ ✓ ✓ ✓
Echo cancellation Minority, but important ✓ ✓
Analysis of sources Level detection Minority, but important ✓ ✓ ✓ ✓ ✓
Frequency domain analysis Minority, but important ✓ ✓
Synthesis of sources Generation of common signals for synthesis and parameter modulation purposes Minority, but important ✓ ✓
The ability to read in standard definitions of wavetable instruments Minority, but important ✓ ✓
Acceptable performance of synthesis Minority, but important ✓ ✓

Revisions and Changes