Right-hand manual: The Russian bayan and chromatic button accordions have a much greater right-hand range in scientific pitch notation than accordions with a piano keyboard: five octaves, plus a minor third (written range = E2-G7, actual range = E1-C#8).

[1] Left-hand manual The bayan (Russian: бая́н, IPA: [bɐˈjan]) is a type of chromatic button accordion developed in the Russian Empire in the early 20th century and named after the 11th-century bard Boyan.

Two Soviet composers of note who wrote compositions for bayan are Vladislav Zolotaryov and Sofia Gubaidulina.

Slovak composer Peter Machajdík composed Concerto for Two Bayans and Orchestra,[3] which was premiered by Acco Duo (Miran Vaupotić & Ivana Levak-Vaupotić), with the Symphony Orchestra of the Pomeranian Philharmonic under Alexander Gref, at the Paderewski Philharmonic in Bydgoszcz, Poland on 4 June 2009.

Russian Bayan virtuoso Stas Venglevski has premiered contemporary works by Yehuda Yannay, Anthony Galla-Rini and William Susman.