No Sound/Audio from Mac to Mac

I have followed all the directions I can find in the community and the knowledge base, and the steps to fix my problem either don't exist or they don't work.

I'm connecting TO a Mac Studio (2022) with M1 Max, running Monterey (12.6) - my WORK computer.  I've installed the latest version of Jump Desktop Connect, created the Multi-output Device, and enabled JD Audio in the Audio MIDI Setup.  I've also selection that Multi-output device under the sound icon in the menu bar.

I'm connecting FROM a Mac Pro (Mid 2010) with 2x2.4 GHz Quad-Core Intel Xeon, running Sierra (10.12.6) - my HOME computer.  I CANNOT update my OS further than that without losing functionality of Final Cut Studio applications.  I'm running Jump Desktop version 8.2.22 - at the moment - because the newest version won't install on this computer.  I have an email in to support about getting a newer version than this, however, because I need dual monitor display functionality.  But, obviously, I will never be able to install the newest version on this particular machine.

I've tried all the different sound options on my HOME computer, but I still get nothing.  I really love the speed of Jump versus what I've been using (Splashtop Business), but I must have sound in order to invest or purchasing Jump is pointless.

Any help is much appreciated.