This tutorial will show you how to create or convert an existing audio file and save it in CCITT u-law – 8KHz 8bit Mono format for use in Cisco Unified Call Manager Express (CUCME), Cisco Unified Contact Center (UCCX) or Cisco Unity Express (CUE). This has always been an easy task with the Windows Sound Recorder that came with Windows XP. However, the sound recorder that comes with Windows 7 does not work the same.
 

 
Requirements

  • Audacity 1.3 or higher

 
Project adjustments

  • Open the source audio file
  • Change the project to rate to 8000 Hz (bottom left)
  • Click the drop-down arrow on the track and select ‘Split Stereo to Mono’
  • Close one of the remaining tracks

 
 
Export U-Law File

  • Click ‘File > Export’
  • Click ‘Save as Type’ dropdown and select ‘Other uncompressed files’
  • Click the ‘Options’ button
  • AU (Sun/NeXT) format
    Header: AU (Sun/NeXT)
    Encoding: U-Law
     
    Or
     
    WAV format
    Header: WAV (Microsoft)
    Encoding: U-Law
     
  • Click ‘Ok’
  • Click ‘Save’
  • Edit metadata and click ‘Ok’
  •  
     
    If you are not interested in using audacity to create u-law audio files and really liked the Windows Sound Recorder in XP, you can also copy the sndrec32.exe executable from an XP machine and run it in Windows 7.
     
     
    Sources:
    Snafder’s Hood – Saving .WAV files for Cisco Unified Call Centre Express Prompts (UCCX) using Audacity

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