to sam2 and DaasYochid: “bemechilas kevod toraschem”- with apologies to your erudition, you have said nothing that contradicts what I say. To quote a Pri Megodim (which I will try to check upon) proves my point, rather than yours. The Pri megodim (as you know) lived barely two hundred years ago-way past the geonim (as you know) and , if indeed he said it, he initiated a new chumro for sefira. You are welcome to follow him but how can you make the tsibbur follow that chumro??
You are saying that the Pri Megodim applied the “ikkar hadin’ to sefira. Again, ‘ikkar chosser min hasefer’. I have yet to see anyone who maintains that the din of ORach chaim 493 (no music all year) is suddeny applied to sefira now. On the contrary, any of the newfangled Poskim who prohibit music during sefira maintain it is part of sefira.
Sam2- you are making assumptions about music and instruments and different times. These are your assumptions,certainly not proven. May I also remind you that there were plenty of musical instruments durign the geonim’s times-yet nowhere is this mentioned in their minhagim for sefira.
Lastly, to assert now that there is an ironclad “minhag’ because the aveilus of sefira is based on minhagim is putting the cart before the horse. I have no problem with anyone who wnats to assume this new ‘minhag” but why do I have to accept it?It is utterly wrong to say that, just because some people make a new minhag, we must all accept it! The gemoro itself allows for minhagim to be different in different places.
And ,as far as R”moshe zz’l, are we bound by any new chumro? Check Manhattan and see whether they have an eiruv on the West Side…then come back t me and tell that we must all follow R’Moshe’s psak.