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dalamb13  
#1 Posted : Thursday, February 4, 2016 2:23:46 PM(UTC)
dalamb13

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Hello, guys. Going to explain my set up: We live stream our church services for those unable to attend. We use a basic set up to keep cost down. We use a Sony camera controlled remotely. Feed goes into a composite to USB device that we purchased from Best Buy (we had to get a higher dollar one because the cheap one didn't work correctly :) ) Our Audio comes from the headphone jack of our soundboard into the headphone jack of our computer. (Keep in mind we have a computer with an upgraded graphics card... didn't spare the money on it! Got it from Best Buy as well.)

Our problem: Many times our audio is wayyy too loud and at other times it can be too low. It sounds normal during our church services, so I'm trying to see if there's a way to compress or limit the audio coming into the computer. We have our headphone jack about 1/4 of the way. In our vMix settings, we keep the volume also around 25%.

Any help or advice is greatly appreciated!
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Ed Tech  
#2 Posted : Thursday, February 4, 2016 5:52:09 PM(UTC)
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Sounds like you have an impedance matching issue. The headphone output from the board is designed to power a speaker, although a small speaker. Generally, this is considered to be a "speaker level" signal and is considerably hotter or stronger than the line level signal your computer audio input requires. This is the reason you are getting the volume swings. Any change in the headphone output makes exponential changes in the input. If your audio board has another line level out, this would dramatically improve your situation.

If this is the only way to do it at this time, you might consider some of the options in the settings of your audio channel in vMix. There is a built in compressor which would be able to help those dramatically loud section be limited.

Is your audio board powered, because if there are lines from the board to the amps, you could easily split one line destined for the amps, and send this line level signal to vMix.

Hopes this helps a little,
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dalamb13 on 2/4/2016(UTC)
dalamb13  
#3 Posted : Thursday, February 4, 2016 5:56:29 PM(UTC)
dalamb13

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Ed Tech wrote:
Sounds like you have an impedance matching issue. The headphone output from the board is designed to power a speaker, although a small speaker. Generally, this is considered to be a "speaker level" signal and is considerably hotter or stronger than the line level signal your computer audio input requires. This is the reason you are getting the volume swings. Any change in the headphone output makes exponential changes in the input. If your audio board has another line level out, this would dramatically improve your situation.

If this is the only way to do it at this time, you might consider some of the options in the settings of your audio channel in vMix. There is a built in compressor which would be able to help those dramatically loud section be limited.

Is your audio board powered, because if there are lines from the board to the amps, you could easily split one line destined for the amps, and send this line level signal to vMix.

Hopes this helps a little,


Yes, our mixer is powered. I have the vMix compressor set to 3:1? Is there a level you would recommend?

I will check into another output. We may have to split out CD recording line. Our mixer has like 4 powered outputs and only a coup of AUX outputs.

I greatly appreciate the help!
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Ed Tech  
#4 Posted : Thursday, February 4, 2016 6:16:53 PM(UTC)
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You might consider an AV powered splitter of AV distribution amp. They are relatively cheap ($20-25) an can take the one CD mix output and make it into four different line level feeds.
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SportsNetUSA.net  
#5 Posted : Friday, February 5, 2016 2:36:52 AM(UTC)
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@dalamb13

Consider experimenting with something other than the built-in audio on your computer. A USB audio interface/sound card such as a Behringer UCA 202 (about $30), Presonus AudioBox, etc., should deliver better audio. As mentioned in another post when building desktop systems for audio production or streaming, I would always disable the built-in motherboard audio device and add quality sound cards.

Try to borrow a USB sound device if you don't want to buy one at this time, to see if it helps. Also make sure you aren't feeding over-modulated audio to vMix. If you are, the compressor function will give you compressed, over-modulated audio which is still not desirable.

And as Ed Tech mentioned, use a line out from your mixer for better results.
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