The Maalouf family

Review of Nassim Maalouf's Improvisations Orientales Video: La trompette arabe de Nassim Maalouf (non-French speakers are advised to watch up to ~4:00) His son, Ibrahim Maalouf "is noted for playing Arabic music with quarter tones on the trumpet, which is a rare skill, pioneered by his father and Don Ellis in the 1960s." Also review. They play a microtonal four-valve trumpet, with a fourth valve played by a left index finger. There are not a whole lot of close-up pics, this is the best I could find (youtube). I did find an article on trumpet modifications, tho.