Islam allows to listen Qawali or not? And does Islam allows to give background music in naat and hamd. kindly give the detail reference of Quran and hadith

Assalaam alaikum,

Islam Question and Answer - THE ruling on Islamic nasheeds (http://www.islamqa.com/en/ref/11563)
Islam Question and Answer - Ruling on so-called “Islamic” songs with musical instruments (http://www.islamqa.com/en/ref/5011/music)

Wa alaikum salaam