Typical south German organs differed from their northern counterparts and could have only a dozen or two of stops, sometimes a single manual and, occasionally, no pedal; much like many Italian instruments. The music of south German composers on the whole concentrates more on melody, harmonic clarity and sound; genre-wise, Italian models were adopted and resulted in German versions of the toccata, a special brand of improvisatory preludes, and ostinato variation forms: chaconnes and passacaglias. Perhaps the last significant southerner was Johann Heinrich Buttstett, Pachelbel's pupil, who continued the trends set by his teacher but did not achieve any considerable fame; it appears that numerous works by him are now lost.