Macromedia captivate 2 User Manual

Setting audio recording options

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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.