Audio balancing and panning
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- Overview of audio in Premiere Pro
- Audio Track Mixer
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- Audio balancing and panning
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Learn how to balance and pan audio for stereo and 5.1 in your Premiere Pro projects using the Audio Mixer.
By default, all audio tracks output to the sequence master audio track. However, you can also create submix tracks. You can output audio from any track to a submix track. You can then out put audio from a submix track to a Master Track. You can use an audio track as an input for a submix track or for the Master Track. You can use a submix track as an output for an audio track and as an input for a Master Track. Different tracks in the same sequence can have different numbers of channels. For example, you can send the output from a monaural audio track to a stereo submix track, and then send the output from the stereo submix track to a 5.1-channel Master Track.
If the number of channels differs between an input track and its output track, you determine how much each of the channels in the input track feeds each of the channels in its output track. For example, you can send 80 percent of the signal from a monaural audio track to the left channel of a stereo submix track, and 20 percent to the right channel. This is balancing. You balance the audio to a stereo output track with Left/Right Pan dials in the Audio Track Mixer. You balance the audio to a 5.1 output track with 5.1 Panner controls in the Audio Track Mixer.
In the Audio Track Mixer, a Left/Right Pan dial appears in a track only when you select a stereo track as the output for the track. A 5.1 Panner control appears in a track only when you select a 5.1-channel track as the output for the track. The relation between the number of channels in an audio track and the number of channels in the output track (often the master track) determines whether the pan and balance options are available for an audio track.
Panning is the moving of audio from one output channel to another, over time. For example, if a car drives from the right side of a video frame to the left, you can pan the channel containing the car audio so that it begins on the right side of the screen and ends on the left.
If necessary, you can balance a clip by applying the Balance audio effect. Do so only after you determine that track balancing isn’t sufficient.
In the Audio Track Mixer, the number of level meters in a track indicates the number of channels for that track. The output track is displayed in the Track Output Assignment menu at the bottom of each track. The following rules determine whether a track’s audio can be panned or balanced in its output track:
When you output a mono track to a stereo or 5.1 surround track, you can pan it.
When you output a stereo track to a stereo or 5.1 surround track, you can balance it.
When the output track contains fewer channels than in the other audio tracks, Premiere Pro downmixes the audio to the number of channels in the output track.
When an audio track and the output track are mono or when both tracks are 5.1 surround, panning and balancing aren’t available. The channels of both tracks correspond directly.
While the master audio track is the default output track, a sequence can also include submix tracks. Submix tracks can be both an output destination of other audio tracks and an audio source to the master track (or other submix tracks). Therefore, the number of channels in a submix track affects the pan or balance controls available in tracks that output to it, and the number of channels in the submix output track affect whether panning or balancing is available for that submix track.
Panning and balancing in the Audio Track Mixer
The Audio Track Mixer provides controls for panning and balancing. A round knob appears when a mono or stereo track outputs to a stereo track. You rotate the knob to pan or balance audio between the left and right output track channels. A square tray appears when a mono or stereo track outputs to a 5.1 surround track. The tray depicts the two-dimensional audio field created by 5.1 surround audio. You slide a puck within the tray to pan or balance audio among the five speakers, which are represented by pockets around the edge of the tray. The tray also includes controls for adjusting a 5.1 surround audio track’s center channel percentage and subwoofer volume. No pan control appears if a track outputs to a submix or master track that contains the same number of channels or fewer; therefore, a pan or balance control is never available for a 5.1 surround track. A master track doesn’t contain a pan or balance control because it’s never routed to another track. However, panning or balancing an entire sequence is possible when you use the sequence as a track in another sequence.
You can vary the pan setting over time in the Audio Track Mixer, or in a Timeline panel by applying keyframes to a track’s Pan options.
For best results monitoring pan or balance settings, make sure that each of the computer or audio card’s outputs is connected to the correct speaker, and make sure that positive and negative wires are connected consistently across all speakers.
Pan or balance a stereo track
In the Audio Track Mixer, do one of the following:
Drag the pan control knob or the value below the knob.
Click the value below the pan control knob, type a new value, and press Enter (Windows) or Return (Mac OS).
Pan or balance a 5.1 surround track
In the Audio Track Mixer, click and drag the puck anywhere within the tray. To snap the puck to a left, right, or center channel, drag the puck to a pocket along the edge of the tray.
Adjust the center channel percentage by dragging the center percentage knob.
If needed, adjust the LFE (subwoofer) channel level by dragging the knob above the Bass Clef icon .
Pan or balance an Adaptive (Multichannel) track
When you work with a sequence that contains an adaptive/multichannel master audio track, you can either click the Set Track Output Channel Assignments button or right-click the track header and select the Track Output Assignment option to assign output channels. The Track Assignment dialog box that appears allows you to mark your mapping on the matrix.
Direct Output Assignment button allows you to mark your mapping on the matrix and the labels right next to it lets you do a quick inspection of the mappings.
If the Audio Track Mixer is not open, select Window > Audio Track Mixer, and select the desired multichannel sequence.
The labels next to the Direct Output Assignment button shows to which Master track channel Premiere Pro automatically assigned the channels of the initial tracks. As you create additional tracks, Premiere Pro automatically assigns their channels to channel 1, 1-2, or 1-6 in a multichannel Master track, depending on the number of channels within the new track. You can click the Direct Output Assignment button to change the assignments.
In the Audio Track Mixer, click the Direct Output Assignment button, and select one of the channels in the Master track as the destination for that channel.註解：
You cannot assign track sends to the Master track in a multichannel sequence.
Pan or balance a track in a Timeline panel
In a Timeline panel, if necessary, expand a track’s view by clicking the triangle next to the track name.
Click the Show Keyframes button , and choose Show Track Keyframes from the menu.
Click Track:Volume at the top left of the track and then choose Panner > Balance or Panner > Pan from the menu. (For 5.1 surround audio, choose the dimension you want to edit from the Panner menu.)
(Optional) If you want to adjust the pan or balance effect over time, move the current-time indicator and click the Add/Remove Keyframe icon .
Use the Selection tool or the Pen tool to adjust the level.
(Optional) If you’re adjusting the pan or balance effect over time, repeat steps 4 and 5 as necessary.