Adobe CAPTIVATE 2, Руководство пользователя

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Setting audio recording options 89
4.
Set the following options:
■
Input source Specifies the type of recording device you are using to create audio. Select
Microphone if you are using a microphone, or select Line in if you are using a different type
of recording device.
■
Encoding Bitrate
In the Encoding bitrate area, you can select the required bitrate at
which audio encoding must be performed. Select one of the following options based on the
audio encoding quality you require:
CD bitrate (128 kbps)
Specifies the amount of audio information (in kbps) that will be
stored per second of a recording, which is of CD quality.
Near CD bitrate (96 kbps)
Specifies the amount of audio information (in kbps) that will
be stored per unit second of a recording, which is of a near CD quality. By default, this
option is selected.
FM Radio bitrate (64 kbps) Specifies the amount of audio information (in kbps) that will
be stored per second of a recording, which is of FM Radio quality.
Custom Bitrate Specifies the amount of audio information that will be stored per second
of a recording, which is of a user-defined quality. You can drag the slider bar to set the
required bitrate.
■
Encoding Frequency Select the frequency at which audio encoding must be performed.
■
Encoding Speed Drag the slider bar to set the required audio encoding speed. Increasing
the encoding speed reduces the quality of the encoded files.
■
Calibrate input Click to display the Calibrate microphone dialog box. You are prompted
to read a sentence into the recording device. Adobe Captivate uses the sample recording to
detect optimal recording sensitivity levels. It is important to calibrate your recording device
for optimal sound quality.
5.
When you finish, click OK.
Using audio from existing Library files
You can reuse existing project audio files for slides in a project.When you insert a new object
(such as an image or video) into your project, the Select audio from library button on the Audio
tab of the new item dialog box is enabled and you can browse the Library for an existing audio
file.
To change the selection of audio files from the Library:
1.
In the dialog box that appears when you insert a new object, click the Audio tab or the
Background Audio tab, or from the Audio menu, select Edit.
2.
Click the Select audio from library button, and confirm the message that appears.
The Select audio from library dialog box appears.
3.
Select a file from the list of Library files, and then click OK.
4.
Click OK to save the changes in the dialog box.