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I don’t think he is implying that at all I think you’re going out on a limb to infer that from his words. I think all he is saying is that listening to goyish music per se does not disqualify one from being a shatz but because of that second consideration of tunes he would use it would disqualify him. Additionally he isn’t discussing Kol isha or songs that discuss divrei cheishek and have inappropriate words and subject matter.