Many aspiring trumpet players have over the years
been stuck when it comes to performing a correct "lip trill" or "shake".
They hear guys like Maynard Ferguson play with wide and fast lip trills
and wonder "how in the world can I do that????"
From the Jimmy Maxwell book
The "shake", the lip trill, you name it, it has many
names as it has interpretations, but the production is basically the same.
It can be put in the catagory of jazz ornaments and like all jazz ornaments
it should not be used too often or it becomes trite and gives the band a
ragged, unorganized sound. Used sparingly it sometimes contributes
to the excitement of a swinging arrangement but I believe it to be much more
effective in a live performance than it is on records or broadcasts. When
it is being played on records or broadcasts, it has to be done carefully
and in a well rehearsed manner or it will just give the band a rough sound,
but in this careful presentation, it is apt to lose much of the impact that
spontaneity would lend to it.