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Monday, 31 January 2011

Saving WAV files in CCITT U-Law format for Cisco Unified Call Centre Express UCCX Prompts using Audacity

Saving .WAV files for Cisco Unified Call Centre Express Prompts (UCCX) using Audacity

Keywords: ccitt, ulaw, u-law, uccx, cisco, voip, wav, 8 bit, audacity, 8-bit, audio, call manager, call centre express, save as, prompt, prompts, recording.
  • Audacity can be used to create .WAV files in the CCITT U-Law 8-bit format required for Cisco Unified Call Centre Express (UCCX) and other Cisco VOIP audio requirements.
  • Audacity is FREE for commercial use. Excerpt taken from Audacity’s website:
  • “Is Audacity really free? Why?
    Yes, Audacity is completely free, open source software. You are free to use this program for any personal, commercial, or educational purposes, including installing it on as many different computers as you wish.”
  • Record the audio however you see fit, Audacity can be used directly; however you can record in any application and open the file in Audacity later.
  • Once you have the file loaded in Audacity (or recorded), do the following:
  •  In Audacity, set the 'Project Rate (Hz)' in the bottom left hand corner to ‘8000’.

  • It is also important that you have it set to MONO (one channel only).
    This can be achieved by clicking on the drop down arrow of the track and selecting ‘Split Stereo to Mono’ and then clicking the ‘x’ on one of the now separated tracks.
  • Now it’s time to export the file…
  • Select 'File'.
  • Select 'Export'.
  • Change the 'Save as type' to 'Other uncompressed files' (yes, it’s a bit misleading as it will make a file that is a lot smaller than the 44000 Hz WAV equivalent - but it isn't actually compressed, simply less samples a second and therefore a smaller file size).
  • Click the 'Options' button (bottom right).
  • Select 'WAV (Microsoft)' for 'Header'.
  • Select 'U-Law' for 'Encoding'.
  •  Click 'OK'.
  •   Choose a name and enter it into 'File name' field (no need to enter the extension .WAV – it will automatically add it).
  •  Click 'Save'.
  • Click 'OK' to the 'Edit Metadata' screen (don't enter ANY metadata).
  • Load the file into UCCX (Applications > Prompt Management).
  • Update the Script and/or Application
  • Test
  • Should work a treat.
  • ALWAYS test uploading to a non-used ‘test Application’ before associating to the main ‘Application’ in UCCX.

Remember, if you don’t set 'Project Rate (Hz)' in the bottom left hand corner to ‘8000’ and don’t make it mono, choosing ‘WAV (Microsoft)’ and ‘U-Law’ won’t be enough!


If you're having super headache creating the files or are out and about and need to record a prompt quickly. You can use Cisco Unity Connection voicemail to email delivery.
I have my Cisco Unity Connection voicemails delivered to my email box.
Some times if I'm out and about and need a file recorded, I ring my work line, leave a voicemail to myself (or get someone else who wants the prompt done to do so) and the file that I'm emailed by CUC is suitable for the UC systems too. It's just a matter of uploading it to the system and refreshing, etc.
Have used this a couple of times when I've been at home and left my laptop and microphone (headset) at the office...worked a treat. I was able to edit in Audacity too (if required).

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Mandala el Ubby
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Lateralus Vinyl Picture Disc
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