Hajibeyov, Üzeyir (1885-1948) There's an official website devoted to his music -
http://uzeyir.musigi-dunya.az/en/fonoteka.html - it has a lot of uploads. But they are in some weird format (".ogg"). I've converted them all to mp3 and put in the downloads section. A curious mixture - complete operas, full orchestral pieces (symphonic, concertante), chamber, solo piano, folk pieces, romances, oriental pieces, Soviet propaganda works, variety show pieces...
I haven't listened to them all yet but so far I like the various pieces called "Sensiz" (which means "Without You") - it exists in various forms, including solo piano, song with orchestra, etc. Also I like the fantasies, Jangi Rhapsody, overtures, Firuza's aria, Sweetheart.....
Hajibeyov can also be spelt Hajibəyov, Hacıbəyov, Khadzhibekov, Gadzhibekov etc etc.