Schneller
German composer
Definition
An inverted mordent — a quick oscillation beginning on the written note and touching the upper auxiliary: the note above, back to the main note. Notated by CPE Bach as a wavy line without a slash. Do not confuse with the standard (lower) mordent.
Interpretive Guidance
Execute very quickly, closer to a snap than a leisurely ornament. In fast movements, keep the Schneller rhythmically tight so it does not blur the main melodic line.