donn post_id=64636 time=1543375577 user_id=60 said:...
Interesting - my L reed does sound different than the M for the same note, but I supposed it was because the L reed was in fact different, because its the kind of reed that also works well an octave lower. At any rate, it doesnt sound like youre claiming any acoustic property for the material itself. It could be acrylic or something and the chamber size effect would be the same - and the chamber size doesnt change after being played for as long as you want, I suppose.
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That L and M reed sounding differently are indeed the exact same type of reed, the same size, the same quality, and if you were to exchange them the difference would still be the same.
Indeed it is at least mostly the chamber shape and sound that determines the sound, although the material could have some minor effect as well.
I have seen some eastern european or chinese accordions with plastic reed blocks (could be acrylic or something else, but not wood in any case) and they did not sound any worse than similar quality accordions with wooden reed blocks. And because these reed blocks can be molded or cast in one go they are a lot cheaper to produce than a wooden reed block. And the plastic reed blocks may be less likely to warp (because of temperature and moisture affecting wood) and cause air leaks. Yes that happens as I have shown before with reed blocks of a Hohner Gola...
Size and shape of the reeds is still the main factor determining the sound, but another important factor is the presence of the valves. As notes go higher at some point (around C6) they no longer have valves fitted and you can hear the change in sound as you transition from the reeds with valves to the reeds without valves. (The change is mainly caused by the hissing of the air being wasted to the reed that plays in the opposite bellows direction.)
So many little things determine the final sound an accordion produces... the reeds themselves are just the start.