Trumpet
Module I

The Instrument

Physics and mechanics. How a lip buzz becomes a standing wave, and how a valve adds tubing to drop the pitch.

plate i · anatomy

Bell — the flare radiates the vibrating column into the room and shapes the bright trumpet timbre. Leadpipe — the gently tapered entry tube; its taper keeps the harmonics in tune. Tuning slide — pull out or push in to lengthen the whole horn and tune every note at once. Mouthpiece — a cup that couples your buzzing lips to the air column; rim, bowl and throat set tone and resistance. i. Mouthpiece ii. Leadpipe iii. Piston valves & felt iv. Tuning slide v. Valve slides vi. Bell flare

You buzz your lips into the mouthpiece and the whole air column vibrates. Pressing a valve diverts the air through an extra loop of tubing, lengthening the horn — and a longer tube means a lower note. Three valves give seven combinations, each its own harmonic series.

the core idea

More tubing, lower note.

Open horn is the highest series. Add the 2nd valve and you drop a semitone; the 1st, two; combinations go further — all the way to 1+2+3, six semitones down. Seven steps, just like the trombone's seven slide positions.

valve combinationopen
open fundamental: C · 116.5 Hz

the air column, vibrating

harmonic 2 — 2 loops

the engine of brass

One combination. A whole series of notes.

Without touching a valve, you climb the harmonic series by changing how you buzz. Here it is, built on the open combination.

tap a harmonic

on the staff (written)

The higher the harmonic, the more the air column subdivides.