Adobe Premiere Pro 2.0 [Electronic resources] نسخه متنی

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Adobe Premiere Pro 2.0 [Electronic resources] - نسخه متنی

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Examining audio characteristics: Lesson 11-1


Audio Lesson 12: the Audio Mixer, audio effects and Adobe's professional audio product, Audition 2.0.


1.

Play the Lesson 11 Intro video.

2.

Open Premiere Pro to the Lesson 11 project.

It has three music clips mono, stereo and 5.1 surround soundas well as a narration clip, audio clips from Lesson 4, and the sound bites and cutaways you worked with in Lesson 8.

3.

Double-click Narration 11 Mono.wav to open it in the Source Monitor. That displays a waveform. The peaks and valleys indicate volume levels.


Note

As highlighted in the next figure, the Toggle Take Audio and Video button automatically switches to Audio-only when you add an audio-only clip to the Source Monitor.



4.

Open the Source Monitor Fly-out Menu and select Audio Units.

That switches the Time Ruler from the standard video-oriented time increments (seconds; frames) to audio samples.

5.

Drag the left handle of the Viewing Area Bar to the right to zoom in on the Source Monitor timeline until the difference between numbered markers is 1,000 samples (use the following figure for a reference).


6.

Type in 1:0 in the Current Time Display and press return.

7.

Press the Left Arrow key once and note that the sample that precedes 1:0 is 0:47999.


There are 48,000 audio samples per second in this clip (48kHz). Switching to Audio Units enables you to make sample-specific edits down to (in the case of this project's settings) 1/48,000 of a second. This might seem like splitting hairs, but there are times when cutting audio with this precision will come in handy.

Note

Audio units display with colons (:) versus semi-colons (;) for Video frame timecode.


8.

Drag the center of the Viewing Area Bar to the left and right to take a closer look at the audio peaks and valleys.


Note

You can drag the right or left handle of the Viewing Area Bar to change the zoom level.


9.

Double-click Music 11 Mono.wav in the Project panel and play it in the Source Monitor.

This is the Adobe Audition 2.0 theme song. Notice the tall thin line at 1:45:09620 (refer to the next figure). That is a drum hit. You can use the waveform display to find sounds like this, including clicks and pops that you might want to remove or edit around.


10.

Double-click Music Stereo.wav and take a look at it in the Source Monitor.

This is how a stereo signal looks. The display follows the industry standard: left channel on top, right on the bottom.


Note

The basic waveform follows what you saw in the monaural waveform with the exception of a segment of the right channel (highlighted in the following figure), where the guitar music (and a couple of other parts) assigned to the right channel had a rest.



11.

Select Edit > Preferences > Audio and make sure the 5.1 Mix Down Type is set to Front + Rear + LFE.

You need to use that setting to hear all six channels of the 5.1 clip in the next step.


11.

Double-click Music 11 5.1.wav and take a look at it in the Source Monitor.

This is a 5.1 surround sound clip that I made using the Surround Sound Encoder in Audition 2.0. It has six channels: right, left, center, right-surround (rear), left-surround (rear) and LFE (low-frequency effectsthe subwoofer channel).


12.

Click on Music 11 5.1 in the Project panel to select it and select Clip > Audio Options > Breakout to Mono.

That creates six links, one for each channel (it does not create six new audio files). Using Breakout to Mono lets you edit individual channels of a stereo or 5.1 clip. For example, you might want to give the LFE channel a bass boost. That does not change the original 5.1 clip. You can link this edited channel to the other 5.1 mono channels and create another 5.1 clip.

[View full size image]


Waveforms are immutable



Nothing that you do in Premiere Pro will affect the original audio or video clip or the visible audio waveform. If you change a clip's volume or apply audio effects to it, the waveform will always display the clip's original volume levels.


13.

Drag Music 11 5.1 to the Timeline and notice that Premiere Pro will not let you drop it in the Audio 1 track.

Audio 1 is a stereo track. When you drag an audio clip to a sequence that does not have a track that matches the clip's type, Premiere Pro automatically creates a new track to suit that clip type. Even though Premiere Pro appears to move the new clip below the Master Audio Track, the new track will appear above the Master Audio track once you release the mouse button.


14.

Expand the view of the newly-added Audio 2 track by clicking its Collapse/Expand Timeline disclosure triangle (highlighted in the next figure) to open its waveform view, dragging the boundary between Video 1 and Audio 1 up the screen, and dragging the bottom of Audio 2 down.

Your sequence should look like the next figure. Note the labels for each of the six channels in this 5.1 surround sound clip.


15.

Click the Source Monitor's drop-down list of clips added to the Source Monitor (highlighted in the next figure) and select Music 11 Mono.


16.

Move the Timeline CTI to the beginning of the sequence.

17.

Click on the Audio 1 track header.


Note

You need to target an audio track for the Source Monitor Insert or Overlay feature to place an audio clip in the Timeline. Even if, as is true in this case, the track is for stereo clips only and the clip is mono. In this case Premiere Pro will automatically add the correct type of track. Were there no targeted audio track, clicking Insert of Overlay would have no effect.


18.

Click the Source Monitor Overlay button and note that because there was no mono audio track in the sequence, Premiere Pro adds a mono audio track below the 5.1 track and inserts that clip there.


Note

You can tell the audio track type by its icon: Mono is a single speaker, Stereo is a double-speaker, and 5.1 says 5.1. The Master audio track is stereo by default. You can change that in the Project Settings > Default Sequence.



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