I’m having trouble producing a low D. Initially it was fine, using my Clarke beginners book and all that but now that i’ve learned high D I always seem to be producing that instead of a low D, any suggestions?
Thanks!
~~TINA
Blowin’ too hard, not covering up a hole good, or ya bent the whistle airway a bit.
Probably a bit of the first and second thing.
One corrective is to approach it from above. Play a note in the bottom octave which you can make comfortably and run down to the low D. When you get there take note of how you are blowing it.
Ah… I don’t feel alone! I was having the same thing happen. Initially I would have no problems with the low D, then I would cross into the upper octave, and then when I’d come back down, I’d again blow high D (when wanting low).
I didn’t think that I was doing anything different, but to correct it I did exactly what Wombat suggested… played the low note, and took note of what was different about my breath and such from the upper octave note.
It can be boring, but an exercise that really helped me at this stage was spending time alternating between octaves - low D, high D, low D, high D . . . starting out slow, going faster and faster, slowing down, speeding up, over and over again.
Spend a few minutes each day doing this (try it in each note of the scale, too) and pretty soon it’s second nature, and you’ll be able to alternate between octaves effortlessly.
Believe me, you’ll need this skill when you try a tune like “Drowsy Maggie” 
You might try getting a bigger whistle.
