Dolby Laboratories Atmos User Manual download pdf (Page 45)

Rendering

Authoring for Dolby

Atmos

™

Cinema Sound Manual 37

2. In the

Select Rendering Mode dialog, click the desired rendering mode.

3. Leave

Objects Only Mode unchecked, unless specifically choosing to re-render object

audio only. In Objects Only mode, all beds are effectively muted.

4. Click

Select.

Note:

With the Monitor application in focus, pressing <D> on the keyboard toggles

between Dolby Atmos, 7.1, and 5.1 rendering modes.

Re-rendering and Clip Level

When re-rendering in 5.1 and 7.1, Monitor application meters use a lower clip threshold

(–3 dB) to replicate playback in a traditional room where the sound arrays are calibrated

to 82 dB.

The RMU includes a +3 dB boost to signal in the surrounds (Ls and Rs in 5.1; and Lss,

Rss, Lb, and Rb in 7.1) prior to clipping and metering, and then a cut of –3 dB after that,

but before the audio output. This results in the output clipping at a 3 dB lower threshold,

and the metering showing a 3 dB higher signal. This also results in the same audio level

output from the RMU to support playback in a room with the surrounds calibrated to 85

dB.

Renderer Command-Line Options for Re-rendering to 7.1 or 5.1

The renderer provides the following command-line options for re-rendering to 7.1 or 5.1:

• --rerenderSurroundCrossover (in Hz)

• --rerenderSurroundGain (in dB)

To use command-line options for re-rendering to 7.1 or 5.1:

1. Make sure the Renderer software is not running on the RMU. If it is running, turn it

off by typing <Q>

in its Command Prompt window or by using the Windows Task

Manager

2. Open a

Command Prompt windo w.

3. On a command line, navigate to the Renderer software, located at:

C:\Program Files (x86)\Dolby Laboratories\Adaptive Audio Renderer.

4. On a command line, type the commands and options to start the renderer, load a

room configuration, and run other actions (including one or both re-rendering

command-line options).

For example (showing print-master playback with both re-rendering command-line

options):

renderer -–atmosconfig E:\RoomConfiguration\config.dac --playlist

E:\FilmName\PrintMaster_1\dub_o

ut.rpl --rerenderSurroundCrossover 50

--rerenderSurroundGain -1

In this example,

E: is the media drive, the first path is the folders where the zipped

.dac file containing the room configuration data is located, and the second path is the

folders where the print master

dub_out.rpl file and other supporting files are located.

5. Press <Enter> to execute the command line.

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Dolby Laboratories Atmos User Manual Page 45

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