BS”D
DY, Sam2: Better, but still not there yet. Of course Chadash is an exception, but still the point is true. One should certainly be machmir on D’oraysahs before d’rabbanan, and d’rabannan before Minhag, and Minhag before who knows where music during sefirah came from. That 20 years ago people didn’t listen to music on Walkmans does not make a minhag in the age of Ipods. Who and where did the P’sak come from? Remember, the concept of portable music player didn’t exist 30-35 years ago, so you can’t say that was a minhag. And if we are discussing live music, Klal Yisroel has paskened (by the proliferation of concerts) like the Rama. (The why certainly is a good question, but the justification is more halachicly sourced than Chadosh). On Sefirah, for music that is danced to, then the SA is a source.
Music on sefirah doesn’t exist in the Gemorah (and neither does sefirah itself), the Rishonim, the Shulchan Aruch, etc. If the source is an Iggros Moshe that is heavily weighted against music as is, and we (as in Klal Yisroel) don’t really follow the teshuva, where did the issur come from?