DaasYochid; HUH?
FACT : most people -today- do not observe the se’if in shulchan aruch 493- about not listening to music all year round. Whether this is right or wrong is a topic for another day.
FACT: the geonim did NOT say that you could not listen to music during sefira. Their ONLY takonoh was not to have weddings and not cutting hair.
ERGO- what you want now is to EXPAND the takonoh of the geonim. Well, sorry , but that is a chumro that you may take upon yourself. It is not part of the takonos for sefira and cannot be forced uopn the tsibbur. QED.