there is a technical reason why pianos have more than one string... equal temperament tuning does not sound right on a piano and the other strings allow somebod

there is a technical reason why pianos have more than one string... equal temperament tuning does not sound right on a piano and the other strings allow somebody to change the notes soft/hard dynamics without changing the notes pitch. this is important when trying to get some chords in equal temperament to harmonize.