My machines 'talk to each other' - my single mouse and keyboard support both PCs.
And I can achieve my objective - sounds from source being heard on destination - using Google Chrome SoundIt.
But I would prefer to use AB because I think it would be easier to control if I master it.
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The Passcodes are puzzling me. Do they (1) relate to existing passwords, or (2) are they specific to AB?
If (1) my existing User Password for my user, on both machines, is only 3 chars - so too short for AB.
If (2) I changed the Passcode on the destination, then tried to change it on the source, and it wouldn't let me.