Jem, Harry’s flute in your Berkenhage pictures that you showed me is his Murray, right enough. When I had a try of it last year, I didn’t have a problem with tuning. The problem I had was stopping the thing shouting. Hard to control the beast.
As for general tuning amongst the sort of flute players one meets in sessions in Ireland, my main complaint is that they are almost always sharp, and get sharper as the night wears on. There was a lovely little street session in Drumshanbo one year, which started with just me (on fiddle), a tin whistler (playing an Oak, if anyone’s interested, and getting a truly lovely sound out of it), a concertina player and a very gentle bodhrán player. Then, in the space of about 10 minutes 7 flutists joined us. After quite a short while (5 minutes?) the conertina playerr and the whistler couldn’t keep playing, because they were, relative to the flutes, so flat. I tried to get people to tune a couple of times, but they’d all dutifully play their As and play them perfectly in tune, and then rattle off into a set of blasting reels a quarter tone sharp.
Another thing that quite of lot of the ordinary session flutists in Ireland seem to do is to play sharp in the upper half of the second octave, whatever other tuning they’re on.
So, as far as sessions go, I’m with others on this one, in that I think when flutists are out of tune, a lot of the time it’s because they don’t listen.
OTOH (and I’m really trying not to launch into my extended thesis here
) this C supernatural thing has been talked about a lot, right from Henebry and before, and certainly plenty since then. It’s quite deliberate, used by both flutists and fiddlers, and any other instruments that can do it - whistles, pipes … I’ve even heard a (particularly good) banjo player do it by bending the string a bit. C supernatural is not ‘out of tune’. Also, FWIW, I prefer a slightly flat F# (flat compared with ET). But I dont get hung up about that one.