Those features are in the new, just launched Premiere CC.
You are probably using Premiere CS6.
Thanks Ann. Do you know why I would still be on CS6 even though I updated
Premiere Pro (on Creative Cloud) today and also restarted my computer to
allow any changes to take effect?
Installing CC7 won't replace CS6. You have them both.
I'm a bit embarrassed that I missed that. I don't use all of the CC programs very often, so my list of "apps" with updates in the update manager was just the same length as my screen and I didn't notice that I could scroll down and see newly released programs. I had just assumed that my version of Premiere Pro (and others) would always update to the latest version.
I have just tried my first audio sync across three cameras plus a separate audio stream and it managed to sync everything but the separate audio, which is a big time saver. I am very pleased to have this feature (it's been a while coming, but very much appreciated now).
Thanks again for your help.