Their first concert conducted by Michail Angelov was well - received , and shortly afterward they began a schedule of concerts and international tours .
The ensemble was established in 1962 by a group of young musicians who played with the Sofia National Opera .
musicians ' first concert conducted by Michail Angelov was well - received , and shortly afterward they began a schedule of concerts and international tours .
The ensemble was established in 1962 by a group of young musicians who played with the Sofia National Opera .