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).
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The bayan differs from western chromatic button accordions in some details of construction:
The differences in internal construction give the bayan a different tone color from Western instruments, and the bass has a much fuller sound. Because of their range and purity of tone, bayans are often the instrument of choice for accordion virtuosi who perform classical and contemporary classical music. Two Soviet composers of note who wrote compositions for bayan are Vladislav Zolotaryov and Sofia Gubaidulina. Russian Bayan virtuoso Stas Venglevski has premiered contemporary works by Yehuda Yannay, Anthony Galla-Rini and William Susman. In his work Drang (1999), John Palmer has pushed the expressive possibilities of the bayan to the limits of virtuosity.[according to whom?]