This warm-up is not a full warm-up, but an emergency warm-up when you are showing up late to the gig or have run out of time and couldn't get a proper warm-up.
I have relied on this procedure for many years when in a pinch. It can also be transposed to TUBA, TROMBONE, FRENCH HORN, EUPHONIUM, and TROMBONE.
6 minute video tutorial
