maybe this has already been covered elsewhere, but..
one frustration of using airtime in a live situation with a console is that you can't reencode post console audio without breaking metadata. This (messy?) hack solves that by grabbing the artist and title info, parsing it and dumping it to a file for another encoder to read.
I was getting the info from the /api directory from the webserver. you could probably get it from a log file somewhere, but this works.
first, in airtime, go to system / preferences and enable "allow remote websites to access schedule..."
get curl, awk, sed and butt. probably, you already have awk and sed on your system. for systems with apt, getting curl is probably something like "sudo apt-get install curl" b.u.t.t. (broadcast using this tool) is an open-source encoder which can pick up the metadata from a file. you can get it from butt.sourceforge.net
copy the following and make a script. don't forget to make it executable! i called mine ./metadata_grabber.sh
great! so when that script is run, it'll copy the live-info page from your local machine, parse it, and redirect it to a file called metadata4 and display that file just so you can test whats going on. assuming everything looks good, you can schedule this (although i'm sure there are more efficient ways) by stacking it in cron. type crontab -e and enter the following lines to run it every 15 seconds
save and exit. configure butt to read the metadata from the file metadata4, and you'll now have the ability to retain airtime metadata while incorporating all of your outboard gear.