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Thread: Audio desync with Dante

  1. #1
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    Audio desync with Dante

    Been running into a consistent issue with TriCaster + Dante

    We have a meeting room setup with a TriCaster Mini, and the audio source is a Shure ceiling array (MXA910)

    The array has a single Ethernet cable carrying power and data back to our switch, which the TriCaster is also connected to, and feeds back to our main studio via NDI.

    Dante audio is routed from the Automix out of the array to inputs 1 and 2 on the TriCaster Mini, which obviously has Virtual Soundcard installed.



    The problem is, even after a factory reset and full update of both of our Minis, audio eventually becomes desynced from video for any meeting over an hour or so. The desync doesn't happen at any particular time, but without fail I will pull up a live meeting a few hours in and audio will be desynced.

    It is visibly desynced in the TriCaster program window and outputs too, so it's not something further down the line. Even disabling/reenabling the Dante audio via Dante Controller doesn't kick it back into sync. The only way to get sync back is to restart the TriCaster, which is obviously not something we can do during a live meeting.

    Is this a known issue at all? How can I go about troubleshooting this?
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    I am consistantly having Audio Sync issues with Dante as well. In my case I have a both an Analog feed from our FOH mixer and a Dante feed. The Dante feed is consistently out of sync from the analog input. I would like to do away with the analog feed but cannot due to the sync issue. This has been a problem with the currently build of Tricaster AE as well as a version from over a year ago. Looks like I orginally posted about this about a year ago... http://forums.newtek.com/archive/ind.../t-150973.html

  3. #3
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    Has anyone else ran into this? Latest Advanced Edition software on the Mini, latest firmware on the Shure array, but live meetings still jump out of sync after an hour or so.

    It's not a drift, there's a brief moment of silence and the audio remains desynced for the rest of the production.
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  4. #4
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    Do you have IGMP snooping enabled on any of your switches handling Dante traffic? If so it can cause major issues with Dante.
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  5. #5
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    Quote Originally Posted by lukerctv View Post
    Has anyone else ran into this? Latest Advanced Edition software on the Mini, latest firmware on the Shure array, but live meetings still jump out of sync after an hour or so.

    It's not a drift, there's a brief moment of silence and the audio remains desynced for the rest of the production.
    Dropouts might be also an issue of the Master Clock drift or drop out. Definitely check out the network switch side too like Zane suggested.
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    I had the same problem luckerctv had two nights ago. I put in a support request. Has the IGMP snooping adjustment fixed the sync?

  7. #7
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    This is still happening to me, and I've always had the correct IGMP settings. After 47 minutes tonight audio became desynced, and even rebooting the Dante device (which is also the master clock) didn't fix it. I can't reboot the TriCaster for obvious reasons, but that will (temporarily) fix the problem.

    So this is definitely a TriCaster issue, what can be done about it?

    Edit: The audio got out of sync by exactly 500ms. A video delay on all 4 inputs can mitigate it temporarily, but that makes controlling PTZ cameras hilariously miserable.
    Last edited by lukerctv; 10-10-2018 at 07:43 PM.
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    Just curious if you would try adding audio delay to the audio channels in question (technically making it worse, and then after applying, bring it back to 0ms delay and see if it corrects at that point until the next drift. I used this trick in one of the TC1 builds but it was with analog audio not Dante but figured was worth a shot.

  9. #9
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    I tried that and similar things. Once the desync happens, it does not recover until the TriCaster is completely rebooted. It's bizarre that even rebooting the Dante device (which is also the master clock) doesn't fix things.

    For some reason, the TriCaster never recovers from the moment of desync, and insists on adding 500ms to the desync each time the "glitch" occurs.
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    When it happens does your Dante setup show you have two master clocks?

  11. #11
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    Another meeting, another desync. This time at around 1 hour 30 minutes, the same 500ms video delay is now required.

    The only master clock (in fact, the only Dante hardware) in the workflow is the Shure ceiling array.

    I just updated this TriCaster Mini Advanced to the very latest version, and made sure Virtual Soundcard was current too.

    Would love to hear from Newtek on how to deal with this
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  12. #12
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    Moreso if you run the dante management software on the LAN do you see both devices show they are master clocks?

  13. #13
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    The only device capable of being the master clock in my network is the Shure MXA array, everything else is software and I don't run Dante Via.
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  14. #14
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    I don't understand why only the TriCaster desyncs by EXACTLY 500ms every time the "glitch" occurs, and can't recover even if the ONLY Dante device is fully rebooted. The only fix is the TriCaster being rebooted, which is the worst solution.

    I've had conversations at shows with users of TriCasters and Dante with the exact same complaints, and the exact same silence from NewTek as far as a solution.

    Kind of stinks you have to pay $30 to add Dante support to each TriCaster, and it's especially frustrating that it doesn't even work well.
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  15. #15
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    Will be even worse for the guys who pay a Premium Access to get advanced audio I/O with that delay problem !!

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