Mezue ahịrịokwu na-esonụ: Šlitr chọrọ igwu egwu na ide ihe n'ụdị "rock" nke oge a na Semafor mana Havlík ekwenyeghị. N'afọ 1966, Šlitr gbara "Ferdinand Havlík Orchestra" ọkụ, mana n'ikpeazụ, ọ kwụsịrị itinye aka ya na Semafor na Suchý. Duo ahụ kewara ụlọ ọrụ nwa oge, Šlitr wee tinye ihe nkiri ọhụrụ "Ďábel z Vinohrad" (Ekwensu si Vinohrady). Ka ọ dịgodị, o gosipụtara ihe osise ya na Wiesbaden, Dortmund, na New York City. Na 1967 ọ gara Expo 67 na Montreal, ebe o gosipụtara ihe ngosi "Stars of Prague", na n'oge ọ nọrọ na America o gosipụtara eserese na Hollywood na Houston. N'afọ 1968 ọ zutere Suchý ma mgbe ihe omume nke Prague Spring gasịrị, ọ weghachiri ọrụ mbụ ya "Ekwensu si Vinohrady" dị ka nzaghachi doro anya nye ndị
Ndị Soviet wakporo Czechoslovakia. Šlitr na Suchý bịanyekwara aka n'akwụkwọ mgbochi ọchịchị 2000 Words nke Ludvík Vaculík dere. N'afọ 1968, Šlitr pụtara na fim ikpeazụ ya, "Zločin v šantánu" (Mmebi iwu na Night Club).