Re: Low Notes "warbling"
I feel silly. :faceinpalm: For the past 6 months or so I have been trying to work through a serious gurgle in my low B and low Bb (but mostly B) with a brand new Yany AWO10. I had been on a serious break (about 11-12 years) and I last played on a Yany A991. I had just assumed that my air column was too unstable after so many years and that was the culprit. Therefore, I have been doing some serious long tone practice. However, after seeing a tip in another thread about the pitch of the mouthpiece coupled with the tuning of the horn causing this problem. Like an idiot I hadn't been practicing with a tuner.

Instead I was just pushing my mouthpiece in about 3/4 of the way on the neck and putting off tuner based practice. But after seeing this tip I dug out my tuner and I was playing 30+ cents flat. After tuning, my mouthpiece was so far in that less than 1/8" of cork was still visible, but guess what? You got it, the low notes starting blowing easy. I could sub tone the or play them straight without the gurgle for the first time. In fact the entire horn was playing much better as I was cracking less notes when practicing intervals. Honestly, I had been playing so poorly I was having a hard time practicing more than an hour a day on alto. But today, for the first time my horn was singing like I would expect and I just lost track of time.
So, one tip from this forum that I have confirmed that if you are having a gurgle in your low notes, you might want to dig out your tuner and make sure you embouchure is set to produce the right pitch from your mouthpiece and that it is pushed in far enough so that your horn is playing in tune.
BTW, I think I saw this tip in relation to playing soprano sax, but it also seems to affect alto and probably to a lesser extent tenor and baritone (although I have never had a gurgle on baritone.)