Apple DVD Studio Pro 4 - Manual (Page 91)

To configure DVD Player for external audio decoder support
1 Open DVD Player.
2 Choose DVD Player > Preferences.
3 Click the Disc Setup icon to show the Disc Setup pane.
4 Choose the external audio device to use from the Audio Output pop-up menu.
5 Click OK.
Using Multiple Audio Formats in Your Project
A project can contain audio in a variety of formats; however, there are some restrictions
regarding mixing formats within an element or group of elements, such as menus.
When you are required to have the same audio format within an element or group of
elements, all settings must be the same:
• Audio type: AIFF, WAVE, PCM, AC-3, or MPEG-1 Layer 2
• Number of channels: This is especially true with the AC-3 audio format, because it
commonly supports a variety of channel configurations.
• Sample size: 16 bits or 24 bits
• Sample rate: 48 kHz or 96 kHz
• Bit rate: 64 kbps to 4608 kbps, depending on the audio type
Tracks
Each audio stream within a track can be in a different format. Within an audio stream,
however, the audio format must be the same for all clips.
Menus
All menus within a video title set (VTS) must use the same audio format. DVD Studio Pro
automatically creates additional VTS blocks as needed to support menus with different
audio formats. See
VTS Editor for additional information.
Slideshows
When adding individual audio clips to each slide or when using multiple audio clips for
overall audio, all clips must use the same audio format.
Required Audio Formats for SD Projects
To ensure that a DVD will play on all SD-based DVD players, there is a DVD specification
requirement that at least one stream of audio for each element be in a specific format.
• For NTSC DVDs: At least one of the audio streams must be either PCM or AC-3.
• For PAL DVDs: At least one of the audio streams must be either PCM or MPEG
compressed audio.
91 Chapter 5 Preparing Audio Assets