הלכה אויף ישעיהו 24:9

And they likewise ordained not to play musical instruments. And it is forbidden to rejoice with all types of music and any instruments that make musical sounds, and it is forbidden to listen to them, on account of the destruction. And even vocal music over wine if forbidden, as it is stated (Isaiah 24:9), "They drink their wine without song." And all of [the Jewish people] has already become accustomed to saying songs of praise and song of thanks to God, and that which is similar to them, over wine.

Similarly they decreed not to play [music] with instruments, and musical devices, and all things that make music to rejoice with them. {Gloss: There are those who say, [the prohibition is] specifically for those whom they regularly play them, like for kings who stand and rest to instruments or in the house of a feast. (Tur) } It is forbidden to make them heard because of the destruction, and even song by mouth over wine is forbidden, as it says: "In song one may not drink wine" (Isiah 24:9). And all of Israel is already accustomed to saying words of praise or songs of thanks and remembering the goodnes of the holy one blessed be he over wine. {Gloss: Similarly for the need of a Mitzvah, like for the house of a Groom and Bride, all this is permitted. (Tosefot, Smag, and Hagehot Maymoni)}