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cacooley  
#1 Posted : Sunday, June 25, 2017 8:04:32 AM(UTC)
cacooley

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I was wondering if anyone can give me some insights into an audio issue I am having. If you listen to this video (
)at 2:12 and 5:39 there is a distortion sound that comes through. We do not hear the sound out of the mixer in the booth only once it is processed into Vmix. It happens about 6 - 8 times during our service. Does not seem to have any specific times that it occurs. We are using a 2 Blackmagic Intensity Pro 4K card cards and I have tried using the audio input on either of the cards with the same results. Any help would be great. Thanks
IceStream  
#2 Posted : Sunday, June 25, 2017 9:14:00 AM(UTC)
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@ cacooley

Might be difficult to isolate since it seems to be random and only noticeable in the recording (I assume it's in the recording and not just in the YouTube transcode).
I also noticed a video glitch at 7:21 which may somehow be related if something is going on internally or in the background that is causing an electro-magnetic interference within your rig. BTW, what are the specs of your system?


Ice
cacooley  
#3 Posted : Sunday, June 25, 2017 10:35:46 AM(UTC)
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@ Ice
Thanks for the quick reply. The rig we are using is as follows:

Intel Corei7 -4790 Processor
ASUS ATX DDR3 2600 LGA 1150 Motherboards Z97-A
Samsung 850 EVO 500GB SSD
16GB Corsair DDR3- 2400 Memory
WD 4TB Black Drive for Storage

SportsNetUSA.net  
#4 Posted : Sunday, June 25, 2017 1:45:46 PM(UTC)
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I noticed a glitch at about the 8:00 mark. Your pastor was speaking of loving this kind of person, but not that kind, in regards to his story of Daniel.

It sounds like "radio" interference on your wireless mic system. The glitch at 2:12 was noticeable on my slower computer, but not on my unit I use for video editing.

Since you said it sounds clean on your mixing console, then the interference is being injected from the mixer audio cable that runs to the Black Magic cards.

Have you tried feeding the audio into the vMix through a USB sound device instead of using the Black Magic cards?
cacooley  
#5 Posted : Monday, June 26, 2017 8:19:13 AM(UTC)
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I have not tried a USB device for capturing audio. I was contemplating trying to capture directly into the computer using the sound card off of the motherboard but had not tried that yet. I do have a AverMedia USB analog capture that I could try and see what results I get. Thanks for the input
SportsNetUSA.net  
#6 Posted : Monday, June 26, 2017 5:10:59 PM(UTC)
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Not to say you shouldn't troubleshoot and find the problem, but do any of your congregation notice these small glitches?

You're putting out very high quality stream of your church service that I would think is well received by your congregation.
thanks 1 user thanked SportsNetUSA.net for this useful post.
cacooley on 6/26/2017(UTC)
kjones9999  
#7 Posted : Monday, June 26, 2017 5:51:44 PM(UTC)
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Are you using any compression. Looking at the audio in audacity this distortion happens with just a little louder volume than the surrounding audio. Its not much but it is louder -
cacooley  
#8 Posted : Monday, June 26, 2017 7:09:23 PM(UTC)
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Thanks SportsNetUSA it is more me wanting to have it the best it can be. No one has told me they have noticed. It sounds a lot worse in the video booth out of our monitors when we are broadcasting. It is my nature to want to find out why something is happening. :)
kJones999 we are not using any compression off of the video booth audio mixer but I believe they are using it in the main feed. It is weird though that it sounds fine in the headphones out of the mixer just not through the vMix audio. Either something is getting induced in the Blackmagic card or in the computer itself. It actually happens more often and sounds worse during the praise and worship music. I feel like the audio is a little distorted during music but levels are not peaking and sounds fine through the headphones. Very strange.
Here was todays live performance that has the beginning with the praise music.
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