Latest post Fri, Aug 10 2018 6:01 PM by Marianna. 3 replies.
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  • Mon, Aug 6 2018 2:29 PM

    • funckdren
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    Audio Dropouts

    I’ve noticed an uptick lately in dropping audio during playback – the sound will just cut out and then come back on. Problem generally goes away if I render audio and play it again or simply reboot my system, which I only do every couple days. I know it’s not a cable or my mixing board – it’s definitely happening within Avid.

    My system specs are up to date. I’m generally editing with DNx36 or 45 media. My drives are connected via USB 3.0 with speeds usually between 350–425 MB/sec, so it seems like my drives are fast enough.

    A few times a day I do get “Exception: Legend Audio Communications error, Hardware Underrun.” Could my Mojo DX just be getting long in the tooth? I don’t recall dropping audio like this over the years with this system, which has been extremely stable.

     

    Mac Pro Westmere 12-Core 3.46GHz, Media Composer 8.6.4, Mac OS 10.11.5, 64GB RAM, Mojo DX [view my complete system specs]
  • Mon, Aug 6 2018 7:09 PM In reply to

    • Marianna
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    Re: Audio Dropouts

    Funckdren

    Where have you been?????   I havent seen you post in a while so hope all is well and you are just busy.

    Recently support updated this article with things that cause this issue.  The reason for the underrun message is that the system is not getting the Media fast enough from the storage location through the computer, to the hardware showing the picture. It’s not really related to an audio problem. The audio is however the first to report that the system is starved of resources and the video I/O hardware can't get the media fast enough through the system.  Audio always takes a back seat to video so thats the first to have issues with thruput.  The old Media 100 use to stutter and when the audio was truned off... voila.  Avid doesnt behave that way but it isnt the audio its the media.

    • Make sure the system has 24 GB RAM (or more) when working in an interplay environment, or when working with large projects.
    More info here: http://www.avid.com/media-composer/specifications  
    • Double check so that the correct supported cards are in the correct slot, and that the BIOS settings are correct.
    More info here: http://avid.force.com/pkb/articles/en_US/user_guide/en269631  
    • Make sure the Power settings are correct. 
    More info here: http://avid.force.com/pkb/articles/en_US/troubleshooting/Exception-Legacy-Audio-Error  
    • If the editing client is in a domain, make sure that all regular users have “Increased Scheduling Priority” Group Policy
    Check Readme for the Media Composer version you are running: http://avid.force.com/pkb/articles/en_US/readme/Media-Composer-Software-8-0-Documentation More info: https://technet.microsoft.com/en-us/library/cc957099.aspx

     

    • Make sure that Anti-Virus is correctly configured and supported, and that other resource heavy programs aren't running at the same time.
    This has been seen with non-qualified, or incorrectly configured antivirus software. (Examples: Symantec Endpoint, McAfee, AVG)  For non qualified antivirus software you can try to optimize unqualified Anti-Virus software putting Avid type files (.mxf .pmr .mdb .aaf .mov .mp4 .avp .avb .avs .xml .omf .png .jpg .ave .awf …and so on) on the "ignore list", exclude folders The Media Composer is using for Projects, Media, cache folder, but there is still no guarantee that non supported Antiviruses will work. If they block access to files, the editor will get stuck waiting for access, and if that time is too long you will see slowness, or errors.

    To verify if it's not the antivirus causing this, you can temporarily disable the antivirus to see if it makes a difference. And you might need to disable this on multiple systems if they work on the same storage/workspace.

    More information about qualified antivirus software and settings: http://avid.force.com/pkb/articles/en_US/troubleshooting/en239659  
    • Make sure the ISIS/Nexis is healthy and performing as it shouldTo do that you can use tools like ISIS/NEXIS Path Diag to verify Avid Shared storage performance.

      and that they don’t have any problems with drives, or the drives on the shared storage.
      Also make sure it's correctly configured with double checking the ISIS/Nexis Client has correct network port settings, correct firewall/network type settings, and client type settings.
    More information here: http://resources.avid.com/SupportFiles/attach/AvidNEXIS/AvidINEXISClientGuide_v7_6.pdf  
    • Enable desktop composition in Windows 7 (Incorrect setting here can cause instability, and performance issues.)
    More information here: http://avid.force.com/pkb/articles/en_US/how_to/Enable-Desktop-Composition-in-Windows-7

     

     
    • Make sure the client have No Power savings in Windows for CPU, USB, GPU and Drives must not spin down for system drives, and external drives.
    More info can be found in the readme guides for Media Composer here:  you have external drives double check the documentation, and software of the 3rd party drive manufacturer.http://avid.force.com/pkb/articles/en_US/readme/Media-Composer-Software-8-0-Documentation ,

    Note! It's very common that external drives might require to be
     optimized with 3rd party software supplied, so it does not spin down. If    
    • Check so that Jumbo Frames are disabled on computers and switches.
    More information in the Network Requirements PDF here: http://avid.force.com/pkb/articles/en_US/compatibility/en244197

    Marianna

     

     

    Director of Online Communities and Forums/Customer Advocate [view my complete system specs]

    marianna.montague@avid.com

    mobile 813-493-6800

    AOL IM:  avidmarianna

    Twitter:  avidmarianna

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    WWLD

  • Thu, Aug 9 2018 3:02 AM In reply to

    • funckdren
    • Top 500 Contributor
    • Joined on Thu, Oct 13 2005
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    Re: Audio Dropouts

    Thanks, Marianna! I will check out all these suggestions. On a whim, I also copied and pasted everything into a brand new sequence and the problem seemed to go away, so maybe I somehow had a corrupt sequence. Stranger things have happened.

    Yes, all is well here -- thanks for asking. I was just on some crazy deadlines for PBS this spring and summer so I haven't posted much. And I had to sort of drop out of the beta-testing program because I felt bad subjecting my producers to all the unpredictability of new software. I'm happily cutting on MC 8.6.4 for now.

    Hope you're having a great summer!

    Mac Pro Westmere 12-Core 3.46GHz, Media Composer 8.6.4, Mac OS 10.11.5, 64GB RAM, Mojo DX [view my complete system specs]
  • Fri, Aug 10 2018 6:01 PM In reply to

    • Marianna
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    • Joined on Thu, Oct 13 2005
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    Re: Audio Dropouts

    They certainly can happen.  Glad at least you got it sorted.

    Having a good summer so far but right in the middle of home renovations so the banging and stuff is driving me mad.  But there is light at the end of the tunnel.

    Be well..

    Marianna

     

    Director of Online Communities and Forums/Customer Advocate [view my complete system specs]

    marianna.montague@avid.com

    mobile 813-493-6800

    AOL IM:  avidmarianna

    Twitter:  avidmarianna

    Skype: mariannamontague

    WWLD

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