At this point you can set levels. I like to bring up the main fader to 0db, then the mic faders up to 0db. At this point I will start to set my gain knobs. Bring them up slowly until you start to hear feedback. Then dial it back a little bit.
This should be a good level. If you get too much feedback and not enough volume, lower your mic stands a little bit (You are fighting against the PA speakers on the ceiling above the pulpit. )
I like to go to the back of the chapel's overflow (all the way back into the gym) to monitor what is happening. It allows me to hear what they are getting over the Internet broadcast, and helps me set levels properly.
Problems! Quick! Help me!
1. Feedback is crazy!
Your gain is too high! Start over. Bring the gain knobs and the faders all the way down. Bring the faders up to 0db, and then bring up the gain to adjust to your feedback limit! It does not get louder than the feedback limit. You must adjust mic position from that point to get louder i.e. get the mics closer to your source.
2. I'm getting radio picked up by this system!
Enable phantom power.
3. There's a loud buzz, what do I do?
You are in a ground loop. On the DI box is a button for the ground loop. Engage it or disengage it until the buzz goes away.
4. There is noise or hiss when I turn off the mixer.
This might happen. I setup a few days beforehand, and leave my audio system unplugged from the church's system until I am ready to go.
5. The organ is overpowering the choir!
The organ is hard wired to the sound system. You will need to open the back of the organ. The cable is located inside the back of the organ near the bottom. It should look like an XLR cable connected to a TRS adapter. Unplug this.
Remember, if you do this, the only organ sound you will be transmitting to the broadcast with be through the mics you have setup. You will need to bring up the volume of those mics during congregational singing.
I've found I only need to bypass the organ if the organ is the accompaniment instrument to the choir.
5. The soloist wants to use the podium mic!
Why is this a problem, you may ask? You lose control of the mix! Setup another microphone for them (the church's dynamic mics will work well for this, or if you have a group, grab a good condenser mic, or use your small diaphragm mics for this. I once heard a full operatic singer sing directly into the podium mic. She completely overpowered the piano accompaniment. Stake Conference needs a little more control over the sound. It could go to 1000 or more people at once.