I side (surprisingly) with charliehall on this one. The original “takonoh” was not to get married and not to cut hair/shave. I am not sure why and when the custom of not listening to music arrived. It may have been a colloraly from engagements that included music and weedings, of course. but it is never mentioned in shulchan aruch that listening to music is ossur. A recent chumroh.
But what of this: “a halacha [not to get married] honored largely in the breach” How is that ? Don’t you think,charliehall, that people follow this precept?