The Richter note arrangement compared to the typical tremolo harmonica from Asia. With music examples. Some Richter tremolo harmonicas are shorter than this and therefore have less notes. The Richter tuned tremolo harmonicas that I own are not tuned to equal temperament. They use a compromise tuning that makes the chords sound better. However, when you play with other instruments that use equal temperament (keyboards, guitars) some of the notes sound flat. The Suzuki tremolo harmonicas that I own are tuned to equal temperament so they sound in tune when played with other instruments but the chords do not sound as nice.