Magdy has been teaching in Finland years. He is notorious about, not telling the source of his music. So after his classes there is vigorous hunts for the titles and singers
. Usually it's really difficult to get all information.
Many teachers sell copies of the music they use. I have heard that in Germany it's very common. That's illegal! I know many Egyptian teacher does the same... Mahmous Reda is one, who prints in his studio, but the music is composed for Reda Troupe. So it's his music. I always want to have the original copy, so I really HATE these copied collections, especially when there is no information at all about the songs. In Egypt one problem is getting the music. If the CD is printed in Europe or US, the teachers can't get it here, but outside even that can't be an excuse.
By the way: The question for an another topic: Why we are so angry for undercutters (I'm, too), but most of us are quite happy to do the same in music and dvd business. Even if we don't do the copying ourselves, we are happy to buy copies. If students really won't buy copies from teachers, there would not be sellers. Right?