@dogberry not a quick recovery or one needing congratulations, but at present my recovery going better than was suggested by a Consultant. I am now up to 8000 Steps on Three Days during a week, with other walk outs being much lesser in Steps on intermediate days. I'll take that as a win, as I this is doing better with my aerobic recovery than was anticipated.
I also did manage to get out and share time with a friend, experience their Home Audio System for a short period on the weekend. Maybe the meeting with a friend was the experience that was the milestone as a point in recovery, the music encounter be just that a music encounter.
As for the rest of the attachments that can be added by another to what a use of a Audio Systems is presented as meaning. I'm sure there are plenty out there, I'm sure they are all able to be a furthering of a form of entertainment when discovered.