Commentary for Avodah Zarah 93:16

There is a dispute in many places in the Talmud over what is the main aspect of the Temple music—is it the playing of the instruments or is it the Levites’ singing. If we hold that the main aspect is the instruments than surely we cannot use parts of an animal that had been worshipped. But if we hold that the main aspect is the singing, then maybe we can use them, because maybe they are there just to make the singing sound better. Alas, there is again no answer to this question.