How can a prepared piano create unusual sounds?

A prepared piano creates unusual, percussive, and otherworldly sound effects through the modification of its internal components.12

By inserting various objects—such as nuts, bolts, and other materials—directly between the piano strings, the instrument's natural timbre is altered. This process, famously utilized by composer John Cage in his Sonatas and Interludes for Prepared Piano, allows the piano to produce a wide range of unique sounds, including:12

• Gentle buzzing and rattling
• Clanging and clunking
• Thumping and ringing timbres

Despite these modifications, the instrument retains its melodic quality. This technique represents a significant departure from conventional Western music, as it transforms the piano into a more experimental, percussive sound source while maintaining the player's ability to perform complex musical structures.13