What does sul ponticello mean in music?

Bowing & articulation

Sul ponticello

Italian, "on the bridge" · Also: sul pont.

Sul ponticello is bowing very close to the bridge, which suppresses the fundamental and brings out high harmonics, producing a thin, glassy, metallic sound.

Moving the contact point toward the bridge shortens the vibrating segment the bow excites, so the upper partials dominate and the note loses its warmth and its clear sense of pitch. Combined with tremolo it produces the shimmering, unstable texture that film scores and twentieth-century orchestral writing use for unease.

The opposite instruction is sul tasto, bowing over the fingerboard, which gives a soft flute-like tone with a weak attack. Both are cancelled by the marking ordinario or naturale. Contact point is one of the three main variables of tone production, alongside bow speed and bow pressure, and moving it deliberately is what separates a controlled sound from an accidental one.

Sul tasto: Sul tasto is bowing over the fingerboard, well away from the bridge, producing a soft, hollow, flute-like tone with very little edge.
Tremolo: Tremolo is the rapid repetition of a single note, played on strings with fast, short bow strokes near the tip, and notated with slashes through the note stem.
Col legno: Col legno is striking or drawing the wooden stick of the bow against the string instead of the hair, producing a dry percussive click.
Harmonics: Harmonics are pure, flute-like tones produced by touching a string lightly at a node instead of pressing it to the fingerboard, notated with a small circle above the note.

Every term in this glossary is taught in context somewhere in Arco's curricula, on the staff, on the keyboard, and on your own fingerboard at the same time.

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