I have come to recognize the biggest problem with my playing. My tone quality from D, in the middle of the bass clef, on down to low E. I have been told that my sound is "cold" down there and needs to be "warmed up." I have been told that when I get down there I blow to hard. I have tried to fix this problem by playing lots of Remington studies and lip slurs, if I do this in a practice session after a bit the sound will start to improve but only after much effort. I think that this exercise is not addressing the actual problem though.
There is another indicator that I think could be an insight in to this problem. I have noticed that I have inconsistent intonation in that range, and I don't think it is related to the slide. Take this situation for instance: When I am working on lip slurs that go from down to up, when I get to fifth position I notice that my low G-flat/F-sharp is flat. So I move the slide up a bit for that low F-sharp and then move it back out for the rest of the partials. But when I return to that F-sharp and go back to that higher up slide position my F-sharp is now sharp. So it is not a slide problem.
It is clearly some kind of other problem realated embouchure and/or air.
I am currently working on the Ewazen Sonata and played the last movement for my teacher Tim Conner. The last movement has many passages in this problematic range. Prof. Conner said that it sounds like I am having explosions on each note in that range. I thought about this for a moment, and I realized that the beginning of this problem starts with the kind of articulation that i use in this range of the instrument.
Here is what I have come up with. If I use a little less tongue and still let the air rush past my embouchure the tone quality gets better. But I have noticed that if I firm up the corners and keep the embouchure firm the tone quality gets even better. (This is what I think is affecting the pitch and flatness down there.) The whole process of playing like this feels a little akward.
I really need to address this problem because I know that I have a great sound on the rest of instrument. My Bolero always gets lots of compliments and my Requiem is good. I think this is related to years of striving to play better in the high range. I have a strong high range, but at some point my tone quality in the lower part of the instrument has suffered.
I know this seems like a lot of writing, but I like the idea of putting this all down so that I can just get it out. Then when I am pracicing I don't have to spend so much time thinking about what the problem is. I can spend all that time actually playing and working it out.