Microsoft KB Archive/894642

= You receive an error message about an audio codec when you try to view a Live Meeting 2003 recording =

Article ID: 894642

Article Last Modified on 1/16/2007

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APPLIES TO


 * Microsoft Office Live Meeting 2005

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SYMPTOMS
When you try to view a Microsoft Office Live Meeting 2003 recording, you may receive an error message that is similar to the following:

The audio codec identified by the format tag 45 is required to play this file. To determine if this codec is available to download from the Web, click Web Help.



CAUSE
The issue occurs because the Live Meeting Replay format that is used by Live Meeting, ACELP.net, does not exist on the Microsoft codec servers. The digital security certificate for the ACELP.net codec has recently expired and is now unsigned. Microsoft no longer signs the .cab codec install package files for third-party codecs. The ACELP.net codec is produced and distributed by the VoiceAge Corporation.



RESOLUTION
To resolve this issue, you can manually download the codec from the VoiceAge Web site. To do this, follow these steps:  Verify that you have administrator permissions to the computer. Download the following file from the VoiceAge Web site to a location on your computer:

http://www.voiceage.com/acelp_eval_eula.php

 Double-click the acelp_net.exe file. Follow the instructions that appear on the screen to install the codec.



WORKAROUND
To work around this problem, you can change the Microsoft Internet Explorer zone settings so that you are prompted to download all unsigned ActiveX controls from the Internet. To do this, follow these steps:
 * 1) Start Internet Explorer.
 * 2) On the Tools menu, click Internet Options.
 * 3) Click the Security tab.
 * 4) Click Internet, and then click Custom Level.
 * 5) Under ActiveX controls and plug-ins, click Prompt under Download unsigned ActiveX controls.
 * 6) Click OK two times.
 * 7) Quit Internet Explorer.

Now when you try to view the recording, you will receive a security warning message. Additionally, you will be prompted to install the codec. Click Yes to install the unsigned codec.



MORE INFORMATION
For more information about the ACELP.net codec format, visit following VoiceAge Web site:

http://www.voiceage.com/codecs.php

The third-party products that this article discusses are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, regarding the performance or reliability of these products.



Additional query words: LM2003 compress decompress

Keywords: kbcontrol kbtshoot kbprb KB894642

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