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Creating Audio Files

Updated: tech writers Edited:

You can create audio files by using the built-in Sound Recorder application in Windows XP or any other audio recording application as long as the file is in the format specified in the Supported Audio File Format section.

Cyara recommends the Audacity tool.
Note: The size of the audio file should not exceed 52.4MB.

Converting an Audio File (Microsoft Windows XP and earlier)

To convert the files into the format mentioned above using ‘Sound Recorder’:

  1. Go to Start > All Programs > Accessories > Entertainment > Sound Recorder.
  2. From the File menu, click Open to open your file in Sound Recorder.
  3. From the File menu, click the Properties menu item and then click the Convert Now button.
  4. In the Sound Selection window, select CCITT A-Law from the Format drop-down list. Select 8.000 kHz, 8 Bit, Mono from the Attributes drop-down list.
  5. Click the OK button.
    As of Microsoft Vista, the Sound Recorder application has been changed and the WAV file processing functionality has been removed. Cyara recommends Audacity for WAV file recording and format conversions. You may need to install the FFmpeg and/or LAME MP3 libraries for Audacity to import your audio file formats.

Converting an Audio File (Audacity v1.3)

To convert files into the correct format using Audacity:

  1. Open or import your audio file in Audacity.
    Note: you may need to install the FFmpeg and/or LAME MP3 libraries.
  2. Set the Project Rate to 8000Hz (bottom left corner drop-down box).

  3. Select Tracks > Stereo Track to Mono to convert to a single channel recording.
  4. Go to the File > Export dialog box, type in a file name, and select a destination folder.
  5. Set the Save as type: to Other uncompressed files and click the Options... button.

  6. Set the Header: to WAV (Microsoft) and Encoding: to A-Law
    Audacity may report that the sample size is '16-bit PCM' when an audio file is loaded. This is the sample size used internally and does not reflect the sample size of the audio file.
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