Why Bartók Made the Piano Sound Percussive

To say that Bartók treated the piano as a percussion instrument is often taken as an instruction to hit it hard. Yet the piano already produces sound when hammers strike strings. Bartók’s real change was to bring our attention back to that event. The beginning of each note, the grouping of rhythms and the contrast between timbres become part of the musical foreground, rather than being softened into continuous legato and pedal.

The 1937 Sonata for Two Pianos and Percussion organises two pianos, timpani, xylophone, drums and cymbals as one ensemble. The percussion does not merely make the pianos louder. Each instrument changes how the others are heard. A xylophone can sharpen the upper register; a drum can expose the skeleton of a piano rhythm; cymbals and tam-tam can prolong or colour sounds that would otherwise decay quickly. The Los Angeles Philharmonic aptly describes the work as a kind of percussion quartet, but its slow movement is also quiet, distant and finely judged.

For the pianist, this does not mean cultivating a hard sound. It means giving every attack a clear function. Accents belong to rhythmic relationships, short notes need differentiated lengths, and pedal should preserve colour without erasing the outline. Bartók’s percussiveness is not brutality. It is an acknowledgement that a piano note begins with an irreversible strike. Once that beginning is heard clearly, strength and restraint can coexist in the same gesture.

https://www.laphil.com/works/sonata-for-two-pianos-and-percussion
https://www.paul-sacher-stiftung.ch/en/about-us/history/2018/2018-09-Bartok-Konzert-MAB-en.html
https://imslp.org/wiki/Allegro_barbaro%2C_Sz.49_%28Bart%C3%B3k%2C_B%C3%A9la%29