Keep in mind I'm a noob at this sort of thing; but I'll try to break it down.
Recording with a Windows PC is not as easy as it seems. It helps to clear the PC of all other tasks, disconnect it from networking, remove the network drivers, stop the disk indexing and so on then replace the audio drivers "Windows sound system" with ASIO drivers.
The Windoze machine is going to be pulling double duty. It's runs our AV system (two flat screens at the front of the church), so it'll be doing that whilst recording audio in the background probably using audacity.
RCA connectins??? I think most pro quality mixer consoles will have balance outputs. Eithe 1/4" TRS or XLR. Then you can cable that to your USB audio interface. But why go through the mixer? The less equipment between the microphone and the USB audio interface the better. You could get better advice if you would tell us what the entire equipment chain is with brands and model numbers.
Well, I'm showing my newbieness (which is why I'm here!) but why NOT go through the RCA connections? There's a 'record out' connection on the mixer I was planning on using. We're not talking about music here, just basic voice.
No dice on nixing the mixer. The reason I've got the microphone on in the first place, running through a mixer is, naturally, to amplify the sound. When I'm speaking I'm speaking through a series of speakers which run from that mixer. The mixer is also attached to other mics, the Windows machine in question, there's a mic over the piano, choir mics, wireless mics, etc. So that's why I want to connect the machine to the mixer. As an added bonus, it'll open the door to recording audio from all of those other sources as well if need be.
There are several USB interfaces that seem to all cost about $150 that would work. They are made by Presonus, Focusrite, MOTU and a few others. Ppretyy much any of the big name recording studio equipment brands is good. There are some knock-off brands to stay clear of.
I like this one best now
Scarlett2i2/
But your plan to simply stuff the PCA out into the line in on a PC would work, if the mixer has the ability to adjust the output level.
You could also use an audio recorder. Why use the computer? Buy a "Zoom H5" and then you have LOTS of options. You can record using the built-in microphones or plug in better external mice or record from the mixer. It is all stored on an SD card. Then you pull the SD card and transfer to some program like Garage Band and edit and mix it
I believe it does have an ability to control the output. I've seen some of the USB units with the ability to control the input volume, too.
Again, using the computer is because I want to use the microphone I'm already wearing. I don't stand in one spot and I'm not keen on carrying a little box around, plus surely audio quality would be far better out of my microphone than out of that thing (unless I were holding it up to my mouth or something). Again this is for recording sermons; not for recording things sitting at my desk or something, but recording live audio as it's being delivered on Sunday morning.
The equipment in question:
Peavey 16FX mixer feeding through a Peavy amp (and feeding into a few self-powered speakers / monitors) You can see the various wireless mic receivers and transceivers stacked on top.
Mic is a MiPro Act 30T
So again, we're talking about live audio; not any sort of studio recording setting. That's why the mixer needs to be there. I appreciate the help! I'll look into what you suggested!