O-hum - Shahram Sherbaf
is an Iranian Rock band from Tehran, formed in 1998 by Shahram Sharbaf (lead vocals, guitar), Shahrokh Izadkhah (guitar), Babak Riahipoor (bass), their first album is called Nahal-e Heyrat
(1999) and there are 4 more after this. Their musical style is the mixture of western rock music with Persian traditional music scales and Instruments. What they did in the difficult years of Iran made them role models for younger Iranian bands and singers.