Wombat wrote:I'm sure I would have heard a Bayan but can't remember when. Are you saying that a Bayan has a pair of reeds tuned in perfect unison? Some Irish accordeon players, probably those who don't double on concertina, favour perfectly dry tunings.
Most Russian accordion music you may have heard had to be bayan.
However, it's picking up worldwide, and bayans consistently win international accordion contests. It's an extremely versatile instrument, and getting to be the most virtuosi-favoured squeezebox.
The Bayan (or B-system chromatic accordion) when taken in their simplest forms (not the multi-voice "concert" 20+ lbs. things) has usually two voices on right hand (flute + bassoon). The tuning is then the same as basic bandoneons: two voices, octaved, dry tuning.
If you get a third voice, it will be in dry unison with the standard "flute" voice, but one will be "in-box" (resonance chamber).
From what I know, Russian-made bayans don't use wax, and have hand-made reeds.
AFAIK, the biggest sound difference between western accordions and bayans is the latter are
never tuned for "tremolo": the origin of the instrument has roots both in classical music and trad, and many Russian composers wrote for this instrument at the turn of 19th and 20th centuries.
The purely "trad" Russian squeezebox is the "garmonj" or "garmochka" (russifications of the German "Harmonika"), i.e. a concertina of sorts.