Václav Talich
Krejčí was born in Prague. He studied history and musicology at Charles University and concurrently piano playing with Albín Šíma and composition at the Prague Conservatory with Karel Boleslav Jirák and Vítězslav Novák and conducting with Václav Talich. He worked for the Slovak National Theatre in Bratislava in 1928–32, Czech Radio in 1934–45, Olomouc Opera in 1945–58, and Prague National Theatre since 1958.