Just as an opinion. From my technical understanding, the russian B-system is more comfortable to play. The main reason is that when on free bass,
that the higher tones of musical text, that are more used to play melodies and variations, fits on the stronger set of finger 2,3,4. See for example every Mozart left hand ornament, or Bach's Cm Preludium. If on C-system you have exactly that rapid changes of notes on weak finger set 3,4,5.
Sure, bayan is great and lots of awesome music is just perfect for it. I'm a big fan of Semyonov's Guelder Rose and his Bulgarian Suite (especially the slow second part).
However, I'm not sure that any one system is 'more comfortable to play' than the others, because music is very varied and so it does not follow that one system is universally more comfortable than others. When it comes to music and accordion systems, 'you win some, you loose some'.
If you see the piano keyboard, and split it in the middle, then you weill see that the left hand acts actually as in the russian B-system.
Yup, I understand the point you are make here about the direction of note pitch travel. Fair point! But one should not forget that the piano player's left hand is free to move, completely untethered by a bass strap, unlike on an accordion or bayan, and so the bayan bass capabilities are not, in my opinion, a complete match for the piano (or other keyboard's) left hand. On some pieces free bass is very capable, but in other pieces 'free bass' is only 'free
ish bass' and is not always ideal.
That’s only half true, the reverse is also equally true. The thing is that most free bass music is based on piano music where the left hand is traditionally going to play the lower octave in the vast majority of the music. This means you play most of the music at the top instead of the bottom on a non-Bayan system.. I find it more logical that BOTH my hands are at the top for low notes and higher as I move down towards my knees, but that has not stopped Bayan players from being amazing.. As far as the weak finger theory, that is only true until one has taken the time to strengthen the “weaker” fingers. The same thing can be said of any accordion, either hand… it will always be harder to use the 4-5 fingers… until you’ve taken the time to work on them.
Some very reasonable points here Jerry! To me, I think a lot of wonderful music was also written for harpsichord, organ, harmonium or even just unspecified 'keyboard' instrument, and much of it is very good on accordion, even using a variety of different free bass systems. As
@saundersbp often suggests, what's really nice is the two part music that's not excessively virtuosic, but just simple and beautifully written.
I'm really appreciating music by John Blow, Henry Purcell, William Croft, Jeremiah Clarke etc, basically harpsichord music from the British Isles. However, to date I'm much less keen on Scarlatti's piano music, as I haven't found many pieces I'd really want to play on accordion. Maybe someone can direct me to the most suitable pieces.
My point? It doesn’t matter what system you can use , you can make amazing music on any system. The most constrictive system has to be the MIII C-system (the system that I play on), and there are tons of amazing accordionists that make wonderful music with it.
I'm not sure about MIII always being the most constrictive - I'm sure on some pieces the left hand will fall perfectly on the right notes in the way they wouldn't on other systems. Plus, you don't have to press any switches to move between free bass and standard bass! Also, Stefan Hussong's version of Bach's Goldberg Variations is the best I've ever heard by anyone (well, apart from the great Canadian, Glenn Gould) and Mie Miki's recordings of Grieg's lyric pieces are magnificent!