Music which incites the love of Allah, His Prophet (صلى الله عليه وآله وسلم), Owliya, and that of country (or Jihad) etc does not come under the category of haram. 1. Almost every Hadith which talks against music also speaks against drinking (alcohol), doing zina with girls etc. So these Ahadith criticize that kind of music which can arouse sexual desires and can lead a person to drinking and zina etc. According to those scholars, the music used in Qawali etc doesnt arouse sexual desires, but incites the love of Allah and His Prophet (صلى الله عليه وآله وسلم), so it does not come under the prohibited category. 2. There are many events where music was played in the presence of the Prophet (صلى الله عليه وآله وسلم) and he didnt forbid it. As the Prophet (صلى الله عليه وآله وسلم) cannot allow a haram thing in his presence, so music is not haram (according to those scholars). 3. On some occasions, when some Sahabi tried to stop someone from playing music, the Prophet (صلى الله عليه وآله وسلم) asked them to continue with their music. This kind of acceptance was not possible for a haram act (according to those scholars). 4. At some marriage occasions the Prophet (صلى الله عليه وآله وسلم) ordered Sahaba to play some music and said that the difference between a marriage and zina is music (which serves as an announcement of that marriage).