Edit audio



Edit audio files

You can edit the audio files in your Adobe Captivate project at any time. Using the Edit Audio dialog box, you can listen to an audio file, insert silence, adjust volume, and change numerous other options.

  1. From Storyboard view or the Filmstrip in Edit view in an open project, find a slide containing audio.

  2. Do one of the following depending on your requirement:
    • Select Audio > Edit > Slide.

    • Select Audio > Edit > Project.

    Note: The Edit option is enabled if a question slide or a project slide contains an audio file. It is disabled for question pools and random question slides.
  3. Make any necessary edits in the Edit Audio dialog box. You can cut and paste sections of the audio file, insert periods of silence to lengthen the audio file, adjust volume, import a different audio file, and use more options.

    Cut Selection 
    Click to cut the selected portion of the audio file.

    Copy Selection 
    Click to copy the selected portion of the audio file.

    Paste Selection 
    Click to paste information from the clipboard. (For example, if you select a section of the audio file, and then click the Cut Selection or Copy Selection button, the selected audio is placed on the clipboard. You can then use the Paste Selection feature to place the audio located on the clipboard back into any location within the audio file.)

    Delete Selection 
    Click to remove the selected portion of the audio file.

    Undo 
    Click to undo the last action taken.

    Redo 
    Click to redo the last action taken.

    Insert Silence
    Select the portion of the audio file where you want to insert silence, and click Insert Silence. Choose from one of the following options:
    Current Selection
    Replaces the selected portion of the audio with silence.

    Start Of Audio
    Adds silence to the beginning of the audio file.

    End Of Audio
    Adds silence to the end of the audio file.

    Playhead Position
    This option is available only when you have not selected a portion of the audio file. The silence is inserted at the playhead position. Use this option when you want to insert an extremely brief period of silence.

    Adjust Volume
    Click to increase or decrease the sound level of the audio file. There is also an option to fine-tune quieter portions of the audio file.
    Normalize
    Select this option to have Adobe Captivate adjust the sound volume automatically. Normalizing audio helps keep the sound level consistent between slides.

    Dynamics
    Select this option to amplify quiet sections of the audio to help compensate for variations in audio volume.

    Ratio
    Specifies the maximum amplification that will be used. The default setting of 2.0 sets the quietest sections of the audio to be amplified by a factor of 2. A higher setting can improve projects with large differences between quiet and loud sections, but can also amplify background noise.

    Threshold
    Controls the amplification of background noise. Anything quieter than the noise threshold is not amplified. If background noise is amplified too much, setting a higher noise threshold may help solve the problem. (Note that the Dynamics option does not work well with high noise levels.)

    Zoom In 
    Click to enlarge the waveform.

    Zoom Out 
    Click to shrink the waveform.

    Settings
    Click to set various options such as recording device, audio quality level, and recording device calibration.

    Export To Podcast
    Export the audio file as a WAV or mp3. You can later use these files for podcasting. Podcasting refers to distributing files over the Internet through web feeds to portable media players, and computers.

    Waveform
    Displays the audio file graphically. The waveform is a visual representation of the audio file.

    Record/Insert New Audio 
    Click to begin recording audio. (To record, you need a microphone.)

    Stop 
    Click to stop playing the audio file.

    Play 
    Click to play the audio file.

    Status
    Displays the status of the audio file as playing, ready, and so on.

    Playhead
    Displays the selected location, in seconds, within the audio file. For example, if you are working with an audio file that is 10 seconds long and you click in the middle of the file, this playhead area displays approximately 00.05.00, or 5 seconds.

    Duration
    Displays the total amount of time it takes for the audio file to play.

    Selected
    Displays the total amount of time selected. For example, suppose you have an audio file that is 20 seconds long. If you click at the beginning of the file and drag to the middle, you will have selected approximately a 10-second span of the file.

    Scale
    Displays the scale at which the waveform is displayed. (To change the scale, click Zoom In or Zoom Out.)

    Library
    Displays the Select Audio From Library dialog box, where you can browse to a new audio file and import it.

  4. Click Select Audio From Library to import an audio file from the project’s Library.

  5. When you finish editing the audio file, click OK.

Edit audio timing

Adobe Captivate lets you edit the timing of audio files after you record or import them. Having control over the timing of audio files gives you the ability to use audio files of different lengths and incorporate them smoothly into projects.

After you record or import an audio file, the file appears as a waveform in the Edit Audio Timing dialog box. If your project contains multiple audio files, you can see which audio files are assigned to specific slides.

 In an open project that contains one or more audio files, do one of the following:
  • Select Audio > Edit > Slide.

  • Select Audio > Edit > Project.

Note: Edit is enabled if a question slide or a project slide contains an audio file. It is disabled for question pools and random question slides.

Audio files in the Adobe Captivate project are displayed as waveforms. Slide numbers are shown along the top of the waveform so you can see exactly how the audio files are currently distributed across the slides.

  • To change how audio files are distributed across slides, click a slide divider and move it to the left or right. The waveform remains static, but you change where the audio file begins to play within the Adobe Captivate project. This option is particularly useful if you have a long audio file and need to experiment with assigning the file to one slide or having it play over multiple slides.

  • To listen to audio, click a location within the waveform and then click Play Audio. The audio plays from the location you selected to the end of all the audio in the project. (You can stop the playback at any time by clicking Stop.)

  • To zoom in on a particular area of the waveform, click in the waveform and then click Zoom In or Zoom Out. (Alternatively, click in the waveform and roll your mouse wheel to zoom in and out). The scale at which you are viewing the waveform is shown in the Scale information box near the lower-right corner of the dialog box.

  • To cut or copy and paste audio, select a section of an audio file directly in the waveform, click Cut Selection or Copy Selection, click in a different location on the waveform, and click Paste Selection.

  • To delete audio, select a section of an audio file directly in the waveform and click Delete Selection.

  • You can insert a silent period within an audio file. If you want the silent period to begin in a specific location within an audio file, click the location directly in the waveform. Click Insert silence. Type in the length of the silent period you want to add and then select from the pop-up menu a location for the silent period: the location you clicked in the waveform, the beginning of audio, or the end of audio.

  • To adjust the sound level of audio files, click Adjust Volume. Use the slider bar to increase or decrease the volume and select audio processing options.

  • To set recording device and audio quality options, click Settings.

  • To add a new audio file, click a location within the waveform, click Select Audio From Library, navigate to a file, and click Open. The audio file is imported directly into the Adobe Captivate project in the location you specified.

Add silence to an audio file

You can add a period of silence to any audio file that is part of an Adobe Captivate project. This feature is particularly useful if you have imported an audio file and need to synchronize the audio with objects and slides. By adding silent periods, you can make the existing audio file work in an Adobe Captivate project without having to edit the audio extensively.

  1. In an open project, select a slide that contains one or more audio files, and do one of the following:
    • Select Audio > Edit > Slide.

    • Select Audio > Edit > Project.

  2. You can add silence to the beginning of the audio file, to the end, or to a specific location within the audio file. If you want to add silence within the file, click the exact location directly on the waveform.

    Note: The Playhead and Selected information boxes near the bottom of the dialog box can help you choose a precise location in the audio file. For example, if you want to add a silent period four seconds into the audio file, click the waveform until the Playhead information box displays a number close to four seconds (that is, 00:04.00).
  3. Click Insert Silence.

  4. Select the portion of the audio file where you want to insert silence, and click Insert Silence. Choose from one of the following options:
    Current Selection
    Replaces the selected portion of the audio with silence.

    Start Of Audio
    Adds silence to the beginning of the audio file.

    End Of Audio
    Adds silence to the end of the audio file.

    Playhead Position
    This option is available only when you have not selected a portion of the audio file. The silence is inserted at the playhead position. Use this option when you want to insert an extremely brief period of silence.

    Note: When you select a part of an audio file, and then click Insert Silence, the pop-up menu lists the Current Selection option instead of the Playhead Position option.
  5. Click OK.

    The silent period is added to the audio file and you can see the silent period in the waveform. The audio file with added silence is saved under a new file name.

  6. To test the audio file with the silent period added, click Play Audio in the bottom left corner.

    If you find that you frequently want to add silence at the same position and of the same duration, press Alt+S to add it without using the Insert Silence dialog box.

Edit audio using Adobe Soundbooth

You can use Soundbooth to edit audio when you want to go beyond the audio editing options available in Adobe Captivate. You can batch process audio files by opening multiple audio files for editing in Soundbooth using the Library panel.
  1. Select Window > Library to open the Library.

  2. Select the files in the library that you want to edit in Soundbooth.

  3. Right-click the audio files that you want to edit in Soundbooth.

  4. Select Edit With.

  5. Select Soundbooth.

Add closed captions to an audio file

You can improve the accessibility of your project by adding closed captioning. Closed captioning lets you create transcripts for audio files associated with the slides in your project. When an audio file is played for a slide, the transcripts are displayed, thus aiding hearing-impaired users.

The option that enables closed captioning is available in the Skin Editor dialog box. For more information, see Slides.

  1. Select a slide that contains an audio file to which you want to add a closed caption.

  2. Select Audio > Audio Management.

  3. Click the Closed Caption button .

    The following options are available in the Closed Captioning dialog box:

    Add
    Click to add a caption. A new row appears in the caption window below. Type the closed caption text in the Caption column.

    Remove
    Click to delete a selected caption row.

    Zoom In
    Click to increase magnification of the waveform.

    Zoom Out
    Click to decrease magnification of the waveform.

    Playbar
    Use these controls to preview the audio file.

    Caption Window
    Each caption appears as a row in this window, with the start time, end time, and caption text. Click any row to edit or delete the text or timing.

  4. If you want to preview the audio file, click the Play button.

  5. Click the specific spot in the waveform where you want to add a caption and click ”+.”

    A new caption row appears with the start time you selected on the waveform.

  6. Enter the caption you want to attach to the audio file.

  7. To add another row to the caption for the audio file, click add. To remove a row from the caption for the audio file, click “-.”

    Note: For more precision, you can drag the end and start time markers of your caption if you want to manually adjust the timing of each caption.
  8. When you have added all the rows you want, click OK.

You can also open the Closed Captioning dialog box in one of the following ways:

  • In Edit or Storyboard view, select a slide thumbnail, click the Audio icon, and select the Closed Captioning option.

  • In the Timeline, right-click the Audio layer, and select the Closed Captioning option.

  • From the Slide menu, select Properties, and in the Slide Properties dialog box, go to the Audio tab, and click the Closed Captioning button.

    In the Closed Captioning dialog box, you can add closed captions while the audio is playing by clicking “+’”or by pressing Alt+A.
    Note: Multiple closed captions must be contiguous. If you do not want a closed caption for an intermediate duration, add a blank closed caption for that duration.

Delete audio from a slide

  1. In an open project, do one of the following.

    • In Storyboard view, select a slide and click the audio symbol in the lower-right corner of the slide.

    • In Edit view, navigate to the relevant slide in the Filmstrip and then click the audio symbol in the lower-right corner of the slide.

  2. Select Remove.

Delete background audio

  1. In an open project, select Audio > Background Audio.

  2. Click the Delete button.