Raised in the tiny farming village of Teaca (Transylvania, Romania), Ban grew up listening to folk songs performed at weddings, birthdays, holidays, and other celebrations.

He established the group Jazz Unit in 1995 and released two albums as a leader for Green Records in Romania.

His American debut album, Somethin' Holy, in duet with baritone saxophonist Alex Harding was followed by the albums Premonition (2003), Tuba Project (featuring Bob Stewart, 2006) and Playground (featuring Jorge Sylvester, 2006).

The Lumination Ensemble, co-led with Alex Harding and featuring drummer Barry Altschul, was nominated one of the ten best shows of 2003 by All About Jazz.

Ban has played with Pheeroan AkLaff, J. D. Allen, Art Baron, Gerald Cleaver, Curtis Fowlkes, Mark Helias, Ron Horton, Brad Jones, Sam Newsome, Reggie Nicholson, Damion Reid, and Nasheet Waits.