You can change the audio output settings for a BrightAuthor project in Zone Properties:
Select the Video Only, Video or Images, Audio Only, or Enhanced Audio zone you wish to edit in the Edit > Layout tab.
Select Zone Properties.
Audio Output: Select the output(s) the zone should use (SPDIF output is not available on all models). For HDMI/SPDIF, select if the audio should be output as Pass through or Stereo:
Pass through: Supplies the un-decoded audio signal through the connector. Use this option if the zone audio (for example, AC3 Dolby Digital) is being decoded on an external device.
Stereo: Supplies the decoded audio signal through the connector.
Change the following options (optional):
Audio Mixing: Send the Left signal, Right signal, or the full Stereo signal.
Initial volume (Audio): Set the initial volume for audio files (0-100).
Initial volume (Video): Set the initial volume for video files (0-100).
Minimum Volume: Set the minimum volume for the zone (0-100).
Maximum Volume: Set the maximum volume for the zone (0-100). This setting can be overridden by other volume settings in a presentation, including the Initial Volume setting for the zone and volume commands attached to events or states.
Fade (in seconds):(Enhanced Audio zones only) Specify the duration of cross-fading between audio files, as well as the fade in and fade out durations at the beginning and ending of a playlist.
