I think this may have been posted before but I will post it again.
For those of you that are interested in hearing what authentic Coptic Orthodox Chants sound like, then try this great web site.
http://www.saintmina-holmdel.org/Multimedia/index.phpIt contains sound clips from different Coptic Liturgies. Scroll down to the middle of the page to listen to section of cants and hymns.
Let me know what you think.