J.A.R. is a leading funk-rock band in Czech Republic. It was founded symbolically on 17th November 1989 (starting date of the famous Velvet Revolution, which marked a fall of the totalitarian communist regime). Basic group created at the time consisted of the author of music Roman Holý and duo of "academic" rappers Oto Klempíř and Michael Viktořík. J.A.R. in the true sense does not work as a band, but rather as occasional meeting of leading Czech jazz musicians and music producers.