If you have a difficult interval in any kind of musical passage, playing the second note as a harmonic makes it even more difficult. You have to put more effort into directing the air and controlling the air speed. Once you have done that though, going back to the original passage without the harmonic seems pretty easy! I see this as good training, the way a weight lifter will shift from heavy weights to light weights (not that my lazy self would really know about this, lol.) This week, working on student compositions, this kind of practice has saved me. However, this time I am applying it to piccolo, and it really works.
The passage in question is as follows:
The last four 32nd notes were troublesome. So I took the E – F# interval and repeated several times slowly, using the F# fingering an octave below (you could also use B natural):
And the A – G interval like this, again repeating several times slowly and with an altered (but still overblown) fingering:
It doesn’t sound pretty! (At least when I play it.) But it does make you work, so when you go back to the original passage, it is much easier!
Any other thoughts? Other applications of this technique?