Vibrato (Woodwinds)

What it is: A periodic fluctuation in pitch and intensity used to color sustained notes. Unlike string vibrato (left-hand finger oscillation), woodwind vibrato is produced by the diaphragm — the player pulses the air column from below.

What it sounds like: Warmth, life, emotional weight. A note without vibrato is "white"; a note with vibrato is "lit up." The amount, speed, and depth all communicate something different.

When to use it: By default — vibrato is expected on sustained melodic lines for flute, oboe, bassoon, and saxophone. Clarinet is the exception: classical clarinet playing is traditionally vibrato-less (the clean, pure tone is the aesthetic goal). Jazz clarinet uses vibrato freely.

Tip: Vibrato is the player's expressive tool, not the composer's. Don't notate a specific vibrato rate unless you have a strong reason. Trust the player. If you want no vibrato (sometimes called "straight tone" or senza vibrato), mark it explicitly — that's an unusual request and players need to know.

The clarinet exception, in detail: Asking a classical clarinetist for vibrato will get you a confused look. Asking a jazz clarinetist not to use vibrato will get you an equally confused look. Know which world you're writing for.