All I (Jerry) can say about JamKazam is that if you can get it to work, it’s a great program, and does what it says it can do (allow musicians to collaborate over the internet in real time, with video, and acceptable latency) most of the time. The proof of this was on May 30, 2020, when JamKazam hosted a 5 hour live concert hosted by JamKazam. 8 bands, half hour sets, with all the musicians playing from their own homes, in sync, and with only a few technical glitches. Here's a link to the concert

JamKazam has recently added a Broadcaster feature to their platform that basically allows a person (preferably not one of the musicians) to totally manage the audio and video coming in from the other musicians.

The 'broadcast' person can adjust the levels of each musician's audio, switch cameras between the incoming video feeds, and stream the finished production directly from their app to the audience.

For their concert, they used the Broadcast feature in conjunction with OBS, so that they could add a host and some graphics to the production. (They blamed their host's sync issues on OBS, but we've not had those issues streaming JOJS jams once the Video/Audio time lag was adjusted for within OBS).

LIMITATIONS
Jamkazam can only be used on a fast mac or windows machine, and with a fiber or cable ethernet connection. (Wi-Fi won't cut it until 5G.) Musicians also need a JamKazam approved digital mixer or audio interface. They claims that the computer's internal audio processing won't cut it either.

NOT FOR THE TECHNICALLY CHALLENGED
From the way they described it, all you need to do is download JamKazam to your computer, and make a few adjustments to optimize your internet access and audio gear and you’re good to go.

The reality is that it’s much more than a quick ‘walk in the park’.

Finding their setup instructions (videos) was the first challenge. It seems that you have to log in to their site, download JamKazam, install it on your computer, and then look under the ‘help’ link for the JamKazam 'support' link, where you’ll finally get to the list of videos. Here’s the link, so you can see the videos without going through all the steps.

Following the setup suggestions in their videos proved to be a bit of a technical nightmare, made more difficult by the fact that most of the suggestions made in the videos are in what amounts to a new language for me, and I assume for most of you.

To get started, you’ll have to make some changes to your advanced router configuration. I can’t prove that something that I did in error during this re-configuration was the reason that I instantly lost my internet connection. Or that I had to spend a number of hours with Comcast tech support (who swears it wasn’t something wrong on their end) to get my internet service and home network up and running. But I’m not willing to try that again.

Then there’s the matter of all of the steps required to get your audio gear/computer setup to work within acceptable latency, jitter and other tolerances. (If they aren’t within spec, JamKazam won’t let you join a collaboration.)

I guess, if your gear is within spec without any tweaking then it’s not so bad, but mine didn’t. Maybe my interface is too old and its latest drivers weren’t compatible with JamKazam, but what ever I tried, (which was mostly guesswork, because I couldn’t find an understandable troubleshooting guide), I couldn’t get within acceptable limits.

It’s (only) slightly easier if you’re on a Mac then on a PC like I am, because most Macs have built in drivers that work with ‘Class Compliant’ USB interfaces and mixers, but there are still lots of settings to tweak.

All in all, I’ve decided to wait until the JamKazam platform has undergone a few more major upgrades.

But still... they deserve applause, because they're starting to make the impossible, possible.