Hi Wallaby Bob-
<<"After checking some of the provided links, I have found national
competitions and festivals are held much later in the year. Because we
are travelling next month these aren't an option. Checking with local
tourist information centers I am sure will provide help with anything
local at the time.">>
I was going to post a note to that effect, but you beat me to it.
The All-Federation Jodlerfest is quite an event, and we used to schedule our trips in June to make sure we could see some of it.
de.wikipedia.org/wiki/ Eidgen%C3%B6ssisches_J odlerfest
On one of our earliest trips to Switzerland, in 1984, we got off the train in Skt. Gallen and found a bunch of Swiss in traditional costumes , some with alphorns. All a surprise.
We got to at least Sarnen, Frauenfeld, and Fribourg. Also, a cantonal festival at Sempach ( Canton Bern).
A few old photos attached.
During the Summer months in particular, and the harvest festivals in the Fall, there will be local or cantonal regional Jodlefests here and there every week, it seems. The village harvest festivals often have a few local groups singing. Those are fun because you can have a beer and a wurst, and get a feeling of the local community.
So, you'll just have to return a bit later in the year. ;-)
When I was in Ftan last September, I was returning from a walk to Ardez, and heard alphorns at twilight.
As I got close to the village, I looked up on a hill and saw the attached image. Nice touch for the tourists, but they might have just been having fun... Hard to tell.