| Word | Description |
| Obstruction | A condition that occurs when an object in the game, such as a pillar, partially blocks the space between a sound object and a listener. |
| Occlusion | A condition that occurs when an object in the game, such as a wall, completely blocks the space between a sound object and a listener. |
| Originals Folder | The folder containing untouched copies of the audio files imported into the project. This folder is usually stored under source control. |
| Orphan Files | Audio files no longer associated with a sound, motion fx, or music object. These files are not automatically deleted when you delete a sound object. To delete these files, clear the cache folder. |
| Output Buffer Latency | Latency introduced during audio playback determined by the number of output buffers used by Wwise. |