On Monday, 19 November 1973, Phoenix held a concert in Bucharest, presenting their new hits "Andrii Popa", "Pavel Cneazul", "Mica Țiganiadă" and "Strunga" which composed the new disc "Mugur de fluier". The new songs were still influenced by folklore yet had a new style. This style was the result of the collaboration with new songwriters Andrei Ujică and Șerban Foarță. Based on those new songs Nicu Covaci created a new show "Introducere la un concert despre muzica veche la români" ("Introduction to a concert about old Romanian music") in which he introduced violins, flutes, archaic percussion and other traditional instruments. The show was never finished due to a new collaboration with "Cenaclul Flacăra". This period is considered the peak for Phoenix.