Concept Of Helping One In Sin And Its Applications (Tawun Alal Ithm)
Taawun alal ithm relates to co-operating in matters of usurping rights of others ( haq talqi ). The issue of Music is a matter of religious interpretation , not an explicit moral evil which falls in taawun. But it is only natural for a Muslim, who considers some individual matter Haram in religion to not participate in it even indirectly.