Dolby Laboratories Multichannel Audio Tool DP570 - Manual (Page 73)

Typical Tasks
Dolby ® DP570 Multichannel Audio Tool User’s Manual 57
Figure 8‐3
Figure 8-2 Typical Downmix Options
Or, if a viewer complains about the audio quality on a mono television when viewing a 5.1
program, the MC operator can quickly select Mono in the Downmix section, and RF to
emulate the viewerʹs listening conditions.
8.2.2 Monitoring Dialogue Level
When changing programs or channels, refer to the dialogue level indicators to verify that
the dialogue level value set in the software—the green numbers in
Figure 8‐3 —and the
measured value of speech—the yellow numbers in Figure 8‐3 —match ± 2 dB.
Figure 8‐4 ‐
Figure 8-3 Dialogue Level Controls
If the dialogue level value doesn’t match, we recommend adjusting the overall audio level
until it does.
In most cases short‐term measurements are best as they provide a measurement over a 10‐
second period of program audio and do not average the measurement over a long period
of time. For more information on the measurement modes, see
Measuring the Average
Loudness of Identified Clips on page 28.
Note: A single program must have a single dialogue level value, and this value should not
change within the program. Adjust audio levels to match the dialogue level if
necessary, rather than the other way around.