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Chapter 2. Starting a Project > Specifying Audio Settings

Specifying Audio Settings

Audio settings control the attributes of the audio that the program plays back. When you choose Audio in the Project Settings dialog box, you can select a data rate, format, type of audio codec, audio interleave, and processing options. Again, it's usually a good idea to match your source audio's settings. When your source audio files differ, choose the audio quality based on your output goal.

To specify audio settings:

1.
Do either of the following:

  • In the Project Settings dialog box, choose Audio from the top pull- down menu.

or

  • Choose Project > Settings > Audio.

The Project Settings dialog box displays the audio settings (Figure 2.28).

Figure 2.28. The Audio panel of the Project Settings dialog box determines the properties of the audio in your project.


2.
From the Rate pull-down menu, choose an audio sample rate.

The most common settings include:

32000 Hz—equivalent to one of the sample rates recorded by most DV cameras.

44100 Hz—equivalent to the sample rate used by CD audio.

48000 Hz—equivalent to one of the sample rates used by many DV cameras.

3.
Specify the audio's bit depth and format by choosing the appropriate option from the Format pull-down menu (Figure 2.29).

Figure 2.29. From the Format pull-down menu, choose a bit rate and format for your project's audio.


8 Bit – Mono—produces a reduced dynamic range with a single channel.

8 Bit – Stereo—produces a reduced

8 Bit – Stereo—produces a reduced dynamic range with separate right and left channels.

16 Bit – Mono—produces the greatest dynamic range with a single channel.

16 Bit – Stereo—produces the greatest dynamic range with separate right and left channels.

4.
From the Compressor pull-down menu, choose an audio codec.

In most cases, leave this menu set to Uncompressed. Audio Compression and Advanced options are most useful for exporting a movie file. For an explanation of each codec, see Chapter 18.

5.
From the Interleave pull-down menu, choose a method of inserting the audio information among video frames (Figure 2.30).

Figure 2.30. For most purposes, 1 Second is the most appropriate option in the Interleave pull-down menu.


1 Second is appropriate in most cases. (For an explanation, see "Enhanced Rate Conversion and Audio Interleave," in Chapter 18.)


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