The tombak (Persian: تمبک), tonbak (تنبک) or zarb (ضرب) is an Iranian goblet drum.^[1] It is considered the principal percussion instrument of Persian music. The tombak is normally positioned diagonally across the torso, while the player uses one or more fingers and/or the palm(s) of the hand(s) on the drumhead, often (for a ringing timbre) near the drumhead's edge. Sometimes, tombak players wear metal finger rings for an extra-percussive "click" on the drum's shell. Tombak virtuosi often perform solos lasting ten minutes or more.