Mapping audio channels
Mapping the audio channels in clips determines the type and number of audio tracks in which they will appear in a sequence. Also, mapping channels determines their destination channels within in the Master Track, and therefore in the final output file. For example, if you map channels 1and 2 in a stereo clip to the Left-Front and Right-Front channels in a 5.1-channel Master Track, the two source channels will appear as a single 5.1-channel track when placed into a sequence, and they will feed the Left-Front and Right-Front channels of the Master Track. When the final output is played through a 5.1-channel surround sound system, the original two channels will be heard through the Left-Front and Right-Front speakers, respectively.
Clip audio channels are mapped to the Master Track when they are brought into a project, by default, according to the Default Track Format you set for Audio Preferences. You can also define how a clip’s audio channels are mapped after bringing them into a project with the Clip > Audio Options > Source Channel Mappings command. You can simultaneously apply this command to multiple clips in the Project panel. When the command is applied, the following controls are available in the Source Channel Mappings dialog box:
- Track Format
- Defines the type of track in which the clip’s audio channels
are presented in a sequence—Mono, Stereo, Mono As Stereo, or 5.1.
- Mono
- Maps the source audio channels so that they’re placed on separate mono audio tracks when the clip is added to a sequence. For example, when you change a clip’s track format from Stereo or 5.1 to Mono, Adobe Premiere Pro maps each channel to a separate mono track. You can apply the Mono track format to clips containing any number of audio channels. When you add the clip to the sequence, the clips on the separate mono tracks remain linked together.
- Stereo
- Maps the source audio channels so that paired channels are placed on separate stereo audio tracks when the clip is added to a sequence. You can apply the Stereo track format to clips containing any number of audio channels. However, if the clip doesn’t contain an even number of channels, a channel with silence is created and paired with the odd‑numbered channel when the clip is added to a sequence.
- Mono As Stereo
- Maps the source audio channels so they are placed on separate stereo audio tracks when a clip is added to a sequence. Adobe Premiere Pro duplicates the audio from mono source channels and places it in the left and right channels of the stereo tracks. You can apply the Mono As Stereo format to clips containing any number of audio channels.
- 5.1
- Maps the source audio channels so that one or more groups of six channels are placed into separate 5.1 surround audio channels when the clip is added to the Timeline panel. If the number of source channels isn’t a multiple of six, Adobe Premiere Pro creates a 5.1 surround audio track with silence on one or more channels when the clip is added to the Timeline panel.
- Enable
- Enables or disables an audio source channel. When you add a clip to a sequence, only the enabled channels are added to the Timeline panel. Disabling a source channel also prevents you from swapping its output channel with another source channel.
- Source Channel
- Lists the original channels of the clip’s audio.
- Track
- Displays the order of the sequence audio track where each
channel will be placed. Note: Under Track, the numbers don’t correlate with the actual audio track numbers.
- Channel
- Displays the channel type and speaker location that the source channel will be mapped to.
- Playback button and slider
- Lets you preview the audio of the selected source channel.
You can preview a source channel whether it’s enabled or not. The playback
button and slider is unavailable if you’re applying the Source Channel Mappings
command to multiple master clips.
You should map source audio channels before adding a clip to a sequence. If you apply the Source Channel Mappings command to a clip after it has been added to a sequence, you can swap only the output tracks and channels between source channels. The Track Format and Enable controls are unavailable, preventing the master clip’s overall configuration from becoming out of sync with instances of the master clip already in a sequence.
Audio channel icons
These icons appear in the Source Channel Mappings dialog box, and in the Audio Output Mapping dialog box.
The following icons indicate channel mapping for stereo mixes:
- Left stereo channel
- Right stereo channel
The following icons indicate channel mapping for 5.1 surround mixes:
- Left front channel
- Right front channel
- Left surround channel
- Right surround channel
- Center front channel
- Low frequency effects channel
Map audio channels in a clip
Map P2 clip audio for export to P2
If you map the clip audio channels to the correct 5.1 channels, you can export audio in P2 clips back to their original four channels in an exported P2 sequence. You may want to do this, for example, if you want to transfer your final output file back to P2 media. Map the channels in your P2 clips in this way before placing them into a sequence, and before using the File > Export To Panasonic P2 command.
- Import the clips into a P2 project containing a sequence with a 5.1 Master Track.
- In the Project panel, select the clip or clips you want to map.
- Select Clip > Audio Options > Source Channel Mappings.
- Under Track Format, click 5.1.
- If necessary, click the 5.1 channel icons until they
map the four source channels in this way:
Ch. 1 to Left-Front Channel.
Ch. 2 to Right-Front Channel.
Ch. 3 to Left-Rear Channel.
Ch. 4 to Right-Rear Channel.
- Click OK.
Map your computer’s audio output to its speakers
You can determine the target speaker in your computer’s sound system, for each audio channel supported by your computer’s audio processor.
- Choose Edit > Preferences > Audio Output Mapping (Windows) or Premiere Pro > Preferences > Audio Output Mapping (Mac OS).
- In the Preferences dialog box, choose Premiere Pro Windows Sound (Windows) or the Built-In input/output appropriate for your system (Mac OS) from the Map Output For menu.
- To change the speaker output for an audio processor channel, drag a channel icon from one source channel row to another source channel row. This step swaps the output channels of the two source audio channels.
smuratore
said on
Sep 29, 2008
at
12:08 PM :
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