You can load and play .wav and .mp3 audio files.

To play an audio file:

1. Load an audio file into the Audio settings.
2. Double-click the audio file in the Scene browser.
3. Click Play in the Audio settings or Transport Controls to preview the audio file.
4. Click Stop to stop the file.
   NoteMotionBuilder supports .wav and .mp3 files but if you install the QuickTime® Runtime Library, MotionBuilder supports many more file formats for playback. (The QuickTime Runtime library is installed when you install Apple QuickTime. Install QuickTime from www.apple.com/quicktime/).