Herbert wrote:

--...the BAYAN, an advanced member of the accordion family. I have read that there are a number of variations of the bayan. Perhaps you could tell us more.--

Sure, it'd be my pleasure! An accordion family counts a couple of dosens of very different instruments.
1. German akkordeon - is canonic (in a bible matter). This country is the "mother land" of an accordion.
2. Italian STRADELLA - is quite simular, but it has some different internal construction.
3. French l'accordeon - has a lots of variations, including DIATONIC accordions. But mostly it's button l'accordeons.
4. Argentinian BANDONEON - is the most weird looking accordeon I've ever seen! But it is a button chromatic accordion. And Astor Piazzola (I hope you've heard this name?) are playing on this instrument with the great virtuosity.
5. Mexicans also has a number of national accordions. I don't know much about them.
And finally:
6. Russian BAYAN. Modified from German piano- to button CHROMATIC accordeon. It has 3 major types.
a) small size, (for children) 54 buttons - for the right hand, and 100 buttons - for the left.
b) full size, (that's what I use!) 60 X 120 buttons.
c) advanced, up to 63 X 140 buttons. Including a lots of timbre-switches and a FREE BASE, which means: you can switch your left hand to a simular button organization of the right hand! And you can play a single notes, using chords buttons. This is very useful for performance of the organ polyphony's of 17 - 18 centuries. The prize of this instrument could be up to $10 000!

Do you satisfied now, Herbert?

--I have tried to download your music as you have recommended. I had no success. I do not speak Russian and could not understand the instructions on the pages. --

You don't have to speak Russian, my friend! If you go to the http://ifolder.ru/f9842 , you'll see the list of files:

303 Pierre_DeGeightere_Internacionale.mp3
ü408643 The_Beatles_I_Saw_Her_Standing_There.mp3
ü407860 ABBA_Dancing_Queen.mp3
ü407923 ABBA_Mama_Mia.mp3
ü407968 ABBA_Money_Money_Money.mp3
ü408005 Bee_Gees_How_Deep_Is_Your_Life.mp3
ü408051 Bee_Gees_More_Than_A_Woman.mp3
ü408087 Bee_Gees_Staying_Alive.mp3
ü408124 Deep_Purple_Smoke_On_The_Water.mp3
ü408209 Dire_Straits_Money_For_Nothing.mp3
ü408231 Francois_La_Mer.mp3
ü408266 Led_Zeppelin_Stairway_To_Heaven.mp3
ü408284 Lord_Creator_I_Cant_Help_Falling_In_Love.mp3
ü408351 Queen_We_Are_The_Champions.mp3
ü408366 Rolling_Stones_Miss_You.mp3
ü408391 Rolling_Stones_Paint_It_Black.mp3
ü408416 Rolling_Stones_Satisfaction.mp3
ü408459 The_Beatles_Come_Together.mp3
ü408501 Village_People_In_The_Navy.mp3
ü408528 The_Beatles_Michelle.mp3
ü408555 The_Beatles_Oh_Darling.mp3
ü408571 The_Beatles_Penny_Lane.mp3
ü408596 The_Beatles_When_Iam_64.mp3
ü408622 The_Melodians_Rivers_Of_Babylon.mp3

You simply click on any link and the new window is appear. Let it completely download. Do you see a rectangle and some FREE LOCATED digits from the left? Well, just print those digits (perhaps 7643) into this rectangle and then click on "„ «¥¥" word (under the rectangle), which means "Continue" and wait until the file download.

The same procedure you can do on http://ifolder.ru/f9873 . This is Russian music:

ü409594 Lilac_Fog.mp3
ü409220 The_ 7_40_Train.mp3
ü409263 Dark_Night.mp3
ü409303 All_My_Exs_Live_In_Taxas.mp3
ü409337 Chardash_Monty.mp3
ü409365 Dark_Eyes.mp3
ü409396 Eine_Kleine_Nacht_Musik.mp3
ü409420 El_Condor_Pasa.mp3
ü409435 Farewell_Of_Slavyanka.mp3
ü409458 Hills_Of_Manjury.mp3
ü409486 Izvozchik.mp3
ü409517 Just_A_Case.mp3
ü409537 La_Vie_En_Rose.mp3
ü409561 Laras_Theme.mp3
ü409626 Love_Me_Tender.mp3
ü409650 Meadow_Lands.mp3
ü409675 Muppet_Show.mp3
ü409687 Pilots_March.mp3
ü409711 Prelude_Fugazza.mp3
ü409738 Quando_Quando.mp3
ü409757 Sailor_Dance.mp3
ü409773 The_Coach_Driver.mp3
ü409796 The_Heart.mp3
ü409837 The_Russian_Bear.mp3
ü409862 Those_Were_The_Days.mp3
ü409877 Volga_Boatmen_Song.mp3
ü409895 Waves_Of_Amour_River.mp3

And we could do better than that. Let's ask the administration of the MNC (MidiNotate Composer) site to upload my albums right here. Maybe on an "Accordion" page?
And then anybody could download my music. Unfortunately, I don't have a software that retriving a music tracks from CD and converting it to mp3 files. But I can just mail my CD's to administration of the MNC site...