Our church recently began a trial version of the latest vMix, on our dedicated Windows 7 PC. No error messages. But some oddities with audio. We have good audio out of our Mackie mixer. We split that output to go to A) an mp3 recorder for folks who only want audio download, and B) the input for the PC handling video streaming. The audio we are hearing in our vMix videos does not sound like what was fed in. Much of the lower frequencies in our speakers' voices is gone. (Today I tweaked the EQ settings: That helped a little.) Plus, even with audio Master level set at or near maximum, I had to go in and apply about 12dB gain to bring the sound in our video up to a stronger level. I have looked around in the vMix settings and documentation, but cannot see a reason.
Let me know what specific details you need; it's 15 miles to the church.

What device you you use for audio-input?

I think what is meant here is more about the signal path from the Mackie to the PC. What type of output from the mixer (balanced/unbalanced), at what level, via what type of cable/connectors into what input device at the PC end? Are you able to check the signal at various points along the way - from leaving the mixer to arriving at the PC end? That's the first step in troubleshooting audio connections.

Another thing could be the Recording Level in the Windows Recording Device properties for whatever device is being used. Clearly there's a loss of level somewhere along the way, the question is where. A simple logical approach of tracing from source to destination usually works best.

Is there anything you know is different in the setup between the Oct 8th & 29th streams?

That really shouldn't have made any appreciable difference. If you temporarily swap back to FMLE, do you get a decent audio level when using the same audio input device? If so, then you can ignore the physical link between the Mackie and the PC, and just look at the software side of things.

In vMix, under the General settings tab for the Audio Input you've added to take the Mackie feed, check the Device Volume setting (which mimics the Level control in the Windows Recording Devices properties). If it's not at 100 and the audio input is coming in low-level, that's the first think to turn up (to 100) before adding further (digital) gain.

No it is more compact. The earpiece itself plugs into a little charger overnight.

I'll take a stab at this one, too.

If you have 1/4" coming out of the Mackie converted to 1/8", where is it connecting to the PC? The Mic In port or the Line In port. Recommended would be Line In. It does matter.

- Tom

I understand Line In vs Mic In. The problem is that someone else handled the PC hardware setup, and the church is in an adjacent city. I will get details of the cable connecting the Mackie to the PC.

Yes, the mp3 was extracted straight from the vMix video file (.ts). Also, the comments re gain and compression are very reasonable. Back in a bit with better information. Thx for your patience!

Listened to the MP3 test. You may need to adjust the Noise Gate so the audio is less "choppy" at the beginning of words (if possible).

What model Maxie mixer are you using?