I've posted here a lot about training "calm" and "speak" as a pair.
When you can ask for barking then you can also ask for it to stop.
I train this every day usually about half-way on a walk. We have a barking session, then stop. Usually go round the loop half a dozen times.
At 5am the milkman comes. Barking starts. I leave it half a minute and ask for "calm". This works. We all go back to sleep.
It's useful to be able to ask for barking. Rowdy youths approaching, lets have some barking.
Mine sounds like a really big dog. Got a deep chest. Great!