Yes, you can use Sunday Mix for a livestream or live performance!
You can totally route audio through Sunday Mix’s audio tracks in real time as long as your computer is up to the task and you have the needed i/o to do so and adjust for latency on the output side. You'll need some sort of broadcast software to get the audio output from Logic synced up with your video.
Some features included in Sunday Mix are only for post production - like the kick and snare replacement. Others like the Sub Kick will work in real time.
Check out this video below to learn how to set up Sunday Mix to record directly into it:
If you are having trouble with latency while using it live, here are some troubleshooting tips:
If using any additional plugins (i.e. Autotune, Waves Tune, Izotope plugins, etc), disable and try to recreate the issue.
Saving to an external hard drive or internal disk? If internal - Try freeing up some space if it is over 75% full. If saving to an external drive, make sure the connection is good and there is plenty of space.
Try restarting the computer immediately before live streaming. This issue seems to be commonly linked to sessions being open for long periods of time.
Reset Logic Preferences:
Choose Logic Pro X> Preferences > Reset All Preferences Except Key Commands.
Delete Logic Preferences:
1. Quit Logic Pro.
2. In the Finder, choose Go > Go to Folder.
3. Enter ~/Library/Preferences, then click Go.
4. Remove the "com.apple.logic10.plist" file from the Preferences folder.
5. If you upgraded from Logic 9 or earlier to Logic Pro X, also remove the "com.apple.logic.pro" file.
6. Restart your Mac.
Try using a different audio interface. It is unlikely, but definitely possible that the interface is causing the issue. You can even consolidate down to using the built-in audio output to see if the issue is still present, therefore ensuring it is a software issue.
If using Mac OS Catalina...it's possible that there is a bug within Catalina. If none of these work, you can try reverting to Mojave, but it will require backing up your computer and wiping it. Here's a great article that will walk you through this.
If none of these things work, it is likely either an audio driver/sound card or OS issue, so you may want to look into that.
Check out all the video tutorials at the Sunday Mix Resource Page!