Bebung
German composer
Definition
A vibrato-like effect unique to the clavichord, produced by varying the pressure on a held key. CPE Bach notated it with a slur and dots. On modern piano it cannot be reproduced, but a slight expressive weight on sustained notes evokes its spirit.
Interpretive Guidance
Where Bebung is notated, sustain the key with slightly varying arm weight to convey the effect conceptually; on piano, consider a gentle dynamic swell on sustained pitches.