Some solo piano music has part-writing that seems to correspond directly to music for string quartet. In such keyboard music, there are a constant number of "voices" tracing coherent individual lines. Beethoven: Opus 110 These voice-parts have integrity. We can follow tenor or bass, alto or soprano (viola or cello, second violin or first violin). This is a modern practice in keyboard music, I believe. The earliest keyboard pieces -- … [Read more...]