Grass Valley Profile XP Aug 16 2004 - Manual (Page 197)

Adding audio tracks
23 July 2004 Profile XP System Guide 197
5. Select Audio , then click Add . The new audio track pair icon appears in the
configuration tree.
6. Use the check boxes in the Audio Channels list to assign an audio channel I/O pair.
Refer to “Using the Channel Configuration dialog box” on page 119 for
information on why some Audio Channels appear dimmed, red, or “in use”.
NOTE: You can verify the audio format of an audio channel pair. Refer to
“Changing the audio I/O format” on page 199.