Set up Tele Speaker and Tele Microphone
Hear a Mac's sound here, and use this Mac's microphone there.
Tele Speaker plays everything a paired Mac plays on the Mac you're at: calls, music and notifications. Tele Microphone makes this Mac's microphone available on the other Mac, so apps there can use it.
Installing
They install together from inside Tele, when you first need them. A panel on the other Mac asks, then that Mac's password, once. You can also install or remove them in Settings › Sharing.
Tele Speaker also needs macOS's Microphone permission on the Mac sharing its sound, once.
Using Tele Speaker
For each Mac, choose Off, Mute, or a volume of 25, 50, 75 or 100 %. Tele remembers it. Off gives that Mac its own speakers back, and so does disconnecting or quitting Tele.
Someone sitting at the other Mac hears nothing from its speakers while Tele Speaker is on.
Still stuck? Contact Support.