Dolby Laboratories Multichannel Audio Tool DP570 - Manual (Page 43)

Troubleshooting Metadata Problems
Dolby ® DP570 Multichannel Audio Tool User’s Manual 27
4.4 Troubleshooting Metadata Problems
The DP570 has several status indicators to help troubleshoot metadata‐related problems.
The front‐panel status display shows the metadata source as External if any metadata
source is set to external.
Metadata Input indicators on both the DP570 front panel and in the DolbyRemote 570
software provide status information. The indicators are green any time a valid metadata
signal is present, whether or not it is being used. They turn red only when an external port
is in use and there is a problem with the metadata signal.
The Metadata Params submenu under either the Setup or status menu on the
front‐panel display can also be used to determine the current source for a parameter and
its current value.
4.5 Outputting Metadata
You can choose to send metadata from the DP570 to downstream devices using the
Metadata Output connector on the rear panel. The frame rate for output metadata is set by
the received video reference signal and is locked to the beginning of the video frame.
4.6 Monitoring Downmixes
The DP570 allows you to audition various downmixes before finalizing the content.
Previewing downmix conditions is essential in providing the best possible audio quality in
listening environments with fewer speakers. Select a downmix mode and make any
necessary adjustments to the metadata or the source mix accordingly.
You can set up separate sets of speakers for different downmix conditions, sending a stereo
downmix to the left and right speakers in your 5.1 listening environment, then to a
different set of stereo speakers just by changing your speaker selection setting. It is a good
idea to have a low‐grade alternate speaker configuration set up to monitor the stereo and
mono downmixes to make sure program content plays appropriately in
“fidelity‐challenged” environments.
To monitor the various downmixes in the DolbyRemote 570 application, click any of the
buttons shown in
Figure 4‐3 , then adjust settings on the metadata tabs as necessary.
Figure 4‐4
Figure 4-3 Downmix Options
Note: If the DP570 is using external metadata and there is a temporary error in the
metadata stream, the unit continues to use the last valid metadata values. When
the error clears, the DP570 resumes using the stream from the external port.