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vMix Call Glitchy audio from external mic
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dec33  
#1 Posted : Wednesday, August 12, 2020 1:42:26 AM(UTC)
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vlc-record-2020-08-11-08h32m52s-Glitchy vMix Call audio sample.m4v-.mp3 (514kb) downloaded 5 time(s).

Hey first post.

Audio issues as heard in the attached clip (did it attach?).

Camera: Sony Venice and FX9 (fx9 in example)
Camera Audio Settings: phantom 48v, mic level, manual gain
Mic: Schoeps and Sennheiser (sennheiser in example) plugged straight into camera
Encoder: Elgato S60+
Laptop: PC and Mac
Browser: Firefox (Chrome will not allow camera selection)

Often at the start of a call the audio is fine. Sometimes as late as 10-15min into the call this will start. Other times it is immediate. It gradually grows worse. I have also experienced it with a Yeti mic plugged into a PC, using the internal camera.

Audio is fine at the camera (listening through headphones) and fine when used with other apps (zoom, skype, etc).


Anyone encountered this before?

Thanks for any feedback.

-G
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dec33  
#2 Posted : Wednesday, August 12, 2020 1:43:37 AM(UTC)
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I should add, the video is fine, no issues.
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mjgraves  
#3 Posted : Wednesday, August 12, 2020 5:49:23 AM(UTC)
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Sounds over-modulated. Level too hot.

Like most WebRTC applications, vMix Call uses the browsers built-in gain control, echo and noise reduction. These can be troublesome in some cases.
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dec33  
#4 Posted : Wednesday, August 12, 2020 7:55:56 AM(UTC)
dec33

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Thanks for the reply.

This issue appears over time, it isn't constant like it would be if my levels were too hot. Also same levels work great in other applications.

I realized maybe it isn't that Chrome is not recognizing any external cameras, but just my external encoder (elgato). Attempted to feed the camera through NDI, and it worked.

Doing a stress test now, but hopefully that does it. Too bad about the Elgato.

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RDP  
#5 Posted : Sunday, September 13, 2020 1:29:26 AM(UTC)
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Were you able to issolate the issue to the external encoder?
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dec33  
#6 Posted : Sunday, September 13, 2020 3:35:55 AM(UTC)
dec33

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Originally Posted by: RDP Go to Quoted Post
Were you able to issolate the issue to the external encoder?


Using NDI (bird dog) there were no issues and the show went on without a hitch. Don't have my hands on any other encoders to test. Hope that helps.
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