Key Clicks

What it is: The percussive sound of the instrument's keys being slapped or pressed shut without blowing air through the instrument. The pitch produced is the resonant pitch of the column for that fingering — soft, dry, and unmistakably "instrument-shaped."

What it sounds like: Soft wooden tapping with a faint pitched ghost. Like hearing the ghost of the note without the body. Mostly attack, almost no sustain.

When to use it: Quiet textural moments, rhythmic patterns inside a sustained note from another voice, "almost-silent" passages, percussive effects in modernist writing, programmatic insect/clockwork imagery.

Notation: Usually an X notehead at the desired pitch with a footnote "key clicks only — no air" or "slap keys." Sometimes notated above a regular staff with the "X" indicating click only.

Tip: Key clicks are quiet. Don't write them against a loud orchestral texture — they'll vanish. Pair them with pizzicato strings, harp, or solo passages.

Listen:

Helmut Lachenmann — most of his solo wind writing
Salvatore Sciarrino — L'Orizzonte luminoso di Aton (solo flute)
Toru Takemitsu — Voice (solo flute)