I am the proud new owner of a high D/C set of Reyburn whistles (LB model), tuned with just temperment. I am no expert player, so my observations are going to be brief and highly subjective, but here goes:
First, the C/D set is really nice because the tuning slide/head is tight enough to hold while playing but not too tight that changing the whistle bodies is a hassle. The mouthpiece is very well finished–it’s the one of the new black ones, not the wood ones he used to use.
The breath requirements are actually lower than I thought they would be. In the first octave, it’s almost nothing (less than my Dixon high D), although you have to push a little in the second octave, especially to get the high D, which otherwise will honk a little (at least when I play). The C, as you would expect, is a little tricker, breathwise.
The whistles are highly responsive. I never knew what people meant when they said that, but last night when I played the few jigs I know, my speed was MUCH faster than it is on my other whistles (mainly Dixons & Shaws). Wow! There’s a hint of chiff but a really beautiful tone.
Of course, the just intonation tuning is what makes this whistles really special for me. I’m not the most play-by-ear player, and by no means have perfect pitch, but these whistles sound—how do I say it? Just a little different than equal temperment whistles. Some of the intervals are noticably different, most obviously when going up & down the scale, but they don’t sound “off,” like when a whistle is out of tune with itself.
I’m not sure how to describe it. It’s sort of like the whistles are a bit different but you can’t quite figure out why, sort of like when you see someone who usually wears glasses without them. I think I could probably play the high D in a session and still seem “in tune.” (That is, if I ever can get good enough to actually PLAY in a session, which I still sometimes doubt!). As I said, someone with perfect pitch might have more to say on this…
Ronaldo tells me this is only high D he’s made with just tempered tuning, so I feel quite privledged! I am going to Ireland next month and I think this is the whistle I’ll be bringing, because it has immediately become my favorite!