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Here is a comparison of a few Bari's. He comments that Low Bb plays like a large tenor which is how I view it as well.
View: https://www.youtube.com/watch?v=teyTPuRFKqE
Well, I've been playing low Bb baritone since 1984 and I have to say the "large tenor" comment makes absolutely zero sense to me. If you try to play baritone sax like it's a large tenor you'll end up with a weak uninteresting sound, strange intonation, and difficulty in completing phrases musically.
As I said earlier, when I hvae a chance to give a spin to a low A, it plays not that much differently than my low Bb except of course for that extra note. That doesn't mean they're all the same, for sure.
Interesting. I had not seen this video. Thanks for the link!
Although I often I find myself not agreeing with his opinions, in this particular case I am with him 100%.
When I play my low Bb Mark VI, the way it is is laid out, and the amount of air that it requires, is not much different than my Mark VI tenor. My Selmer bari and tenor play incredibly similar to each other. (BTW, bari has been my main axe since uni.)
Even my low Bb Committee III is easy-blowing, and while requiring more air than my Selmer bari, requires far less less air than my low A bari. Which brings me to my Couf.
My low A Couf is a beast when it comes to both weight--how much? I don't know, but now I am going to weigh all my big horns b/c this conversation has me very curious--and amount of air it requires. I wish a had a low Bb Couf to compare it to, to see if it is this particular horn, or if all JK baris from the era were like this.
Conversely, I would like to try a Mark VI low A or Martin Magna low A to see what they are like, to see what the difference really is.
Bottom line, I do find that my low Bb and low A horn baris respond differently, and most definitely have different tonal complexities. I always assumed it had to do with the fact that they were different makes & models.
However, after viewing this video, I am coming to the conclusion that while yes, make & model obviously do make a difference, that extra 1/2 step does in fact change the horn's tonal complexity, and response.