Trills between notes that are far apart???

[flutemediocrity]

Hi all!
I am new to forums in general, but I felt it was now necessary to post this question.
For a piece in band, I must play a trill from the high Bb to Eb (or something close to that, doesn't matter if it sounds bad in this case). Apparently, Bb to F is also acceptable, should Eb be too complicated.
I do use the trill key that takes me from Bb to F, but due to the distance in pitch, my airstream requires such changes that I cannot actually trill. I can definitely move my fingers fast enough, but the airstream cannot change with it. I've been noodling with it for the past couple weeks and still cannot achieve anything. When I switch back to the Bb, it just overblows to the F. Something to note is that I switch between these trills and a Bb to C trill, should that make a difference to someone's answer.
Does anyone have some magical fingering or tips that I could use? Even if it isn't a direct solution to this, any tips and advice would be very much appreciated. I feel like I've looked everywhere and this is my last hope haha. I have to have this mastered within 2 weeks. D:

Thanks!

[pied_piper]

Technically, what you are describing is not a trill but rather it is called a tremolo. That's why you can't find fingerings for a Bb-Eb trill. Trills are between adjacent notes (half or whole step). Alternating between any notes with a larger interval is a tremolo.

Regardless, I do believe that I have answered your question for another person several years ago. In that case, the flutist's band was playing a version of Star Wars with a Bb-Eb tremolo. That tremolo is actually fairly easy. Finger the high Eb and "trill" (open and close) the second and third fingers of your left hand. See this link to another posting here where I provided more details:

http://www.fluteland.com/board/viewtopic.php?t=7478

[flutemediocrity]

THANK YOU SO MUCH!!! I will definitely try this out when I have time! You are an absolute lifesaver. Also, I'm also playing a version of Star Wars! What a coincidence, eh? :O I'm sure this will take some getting used to, but I'm very excited to try it out! Once again, thank you so much!

[pied_piper]

You are very welcome. Be sure to let us know if that worked for you!

[flutemediocrity]

IT WORKS!!!!!!!!!!!!!!!!!
Thank you so much!! I must have skipped over this particular fingering while noodling around. I have been saved!!

[flutemediocrity]

Oh, I forgot to mention: one has to be careful not to overblow! Otherwise it turns into an Eb to F haha. This is by far the best combination I have tried though.

[pied_piper]

Great! Glad it works for you.