Dear Mr. Brannen,
I tried to use your suggestion, but evidently not as you would have done. I fouled up the channel I was trying to restore, whose number was 1. Sadly, without trying to do anything to No. 2, I also did something to it, and now it shows No. 1's silent picture. By sheer luck, I had written down No. 1's pid numbers, and therefore could restore its silent service. I neglected to write down No. 2's pids.
Since I finished this message, I succeeded in restoring No. 2 by rebooting my AZ Box. Prior rebooting had not worked, hence my original message; but now, I would like to resume trying to obtain sound from No. 1. I fear that explaining the problem fully and publicly would compromise our forum. I will send you a private message shortly.
And, in advance, thanks.
Regretfully,
Gordon