"ARB" is a circle of musicians united by their interest in traditional jazz – ragtime, Dixieland, blues.
The band was formed in 1986 by Roumen ‘Fatso’ Alexandroff – banjo player and band leader. ARB has been playing in different formations. For a long time they performed mainly as a trio – clarinet, banjo, tuba; occasionally as a quartet with piano, and in some cases added a trumpet, trombone and saxophones.
Since 1987 until summer 1990 "ARB" hosted the Saturday Jazz Club and organised the "Jazz In The Garden" festival in Sofia. The band has taken part in all Bulgarian jazz forums. Well-known saxophonist Julian Yanushev was the long time soloist of "ARB". Other well-known musicians have played with the band – Svetozar Roussinov, Venko Zahariev, Stoiko Radnev, Gencho Vurtovski, Georgi Kornazov and Vladimir Slavchev.