Dolby Laboratories DP570 - Manual (Page 48)

36 Dolby ® DP570 Multichannel Audio Tool User’s Manual
Using the DP570 Features Using Lt/Rt Input Mode
4.10.2 Emulator-Only Presets
Emulator presets are particularly useful for checking specific combinations of downmix
and compression modes, perhaps on a different speaker output. For example, you can
audition current metadata settings for a 5.1‐channel program in Full mode (no downmix)
with no compression (the default for the Custom selection), then check the mono downmix
in RF mode on the mono speaker output in one click without altering the metadata settings.
Once you select the listening parameters, choose a preset number under User Presets, and
under Type choose Emulator.
4.10.3 All Settings Presets
To save a combination of authoring and emulator settings as a preset, select All under Type
when saving the preset.
Presets that include both authoring and emulator settings do not display any letter after the
preset number on the display.
4.10.4 Using Different Preset Types to Audition Settings
If you are assigning metadata to a program, the different preset types can be used in
sequence to speed your process.
Example
You set the emulator to Full (no downmix) with no compression (the default for the
Custom selection). You then audition a few authoring presets until you find the
combination that suits the program best. Next, you switch among the emulator presets to
make sure the metadata you have selected works in a variety of downmix settings. Now
you know you have settings that maximize the mixing capabilities for all your potential
listeners.
By using presets, you both save time and increase the accuracy of your checking, since
there are multiple variables in both the authoring and emulator sections.
4.11 Using Lt/Rt Input Mode
The DP570 provides a separate input (Lt/Rt) for a signal encoded in Dolby Surround. When
you activate the Lt/Rt Input mode, the emulator is fed only by the Lt/Rt input, and the
DP570 sends a Pro Logic
® decoded signal to your monitor system. You cannot alter settings
for the signal from the Lt/Rt input, but you can use the input to ensure that an Lt/Rt mix is
performing as expected.
!
Caution: Changes to metadata parameters may be made while in Lt/Rt Input mode, but
you cannot hear the effect of these changes, because the emulator is dedicated
to Lt/Rt input signal. Therefore, you should not change metadata values in
Lt/Rt Input mode.