Chromatic HarmonicaComplete 12-note octaves with all the sharps and flats can be played on a Chromatic Harmonica. Each single hole contains four reeds a blow reed and a draw reed for two natural notes as well as a blow reed and a draw reed for two chromatic notes. A side sliding button is pushed to activate the chromatic notes, which closes off the airflow from one set of reeds and enables the other set to vibrate. All Hohner chromatics except the Koch and Slide Harp are solo tuned, meaning each group of four holes covers a complete octave.. The Hohner 255/48 Chrometta 12 Harmonica has smooth, rounded covers, large, accessible mouthpiece openings and a beautiful tone make this model ideal for both beginning harmonica players as well as advanced harmonica players. The Hohner 255/48 Chrometta 12 has a 4 octave chromatic range and is equipped with wind saving valves and a moisture proof comb. 12 holes, 48 reeds. The Hohner 255/48 Chrometta 12 is a chromatic harmonica designed to play every complete scale in any key. You can play major, minor, pentatonic, or blues scales all on one harmonica. Additionally, all accidental notes are available at any time for any situation. Each single hole contains four reeds; two natural notes and two chromatic notes. The reeds for the chromatic notes are enabled by pushing a slide button on the side of the harmonica. Most chromatics are solo tuned, which means each group of four single holes covers a complete octave. This design offers a wealth of new musical options to the player. Most commonly chromatic harmonicas are heard within the classical and jazz scenes, but often these harmonicas are used for blues, folk, rock and pop as well. Chromatic Harmonicas For Beginners The 4 harmonicas of the Chrometta series offer an excellent basis for beginning the chromatic harmonica playing. They combine the best cost-to-value ratio with a robust design.