6 plus 6 instrument
6-plus-6 instruments are chromatic musical instruments in which two rows of keys, strings or sound bars are each attached with whole-tone spacing. Both rows themselves are offset by a semitone. This arrangement always results in the same fingering for a piece of music, as long as its starting note is on the same side. If the starting note is on the other side, then the fingering for the same piece is mirrored. If there is another row that is identical to the first, the fingering is the same for all keys, e.g. B. the three-row 6 + 6 accordion.
The 6 + 6 arrangement is taken into account in the Beyreuther music principle.
The following instruments are known as 6-plus-6 instruments:
Keyboard instruments
- Upright piano and grand piano with the new keyboard by Heinrich Josef Vincent
- Piano, grand piano, harpsichord and harmonium with the Janko keyboard
- Three-row chromatic accordion
Stringed instruments
- Chromatic Salzburg dulcimer
- Chromatic harp
- The bowed psaltery and violin zither can easily be made as a 6 + 6 instrument by arranging the strings accordingly.
Percussion instruments
In addition to the straw fiddle, these instruments are also offered with removable sound bars. This converts conventional chromatic instruments into 6 plus 6 instruments.
Instruments with a shifted 6-plus-6 arrangement
In these instruments, both rows are offset by more than a semitone in at least one direction.
- Hayden- Duet- Konzertina : Here, too, the same fingering applies to all keys.