Miroslav Filip left a striking mark on several fields of musical theory: he devoted himself to the question of note systems and the system of tonal harmony (Developmental Laws of Classical Harmony; co-author of Theory of Harmony and Concise Theory of Music), musical acoustics, applied musical acoustics, electroacoustics (vocal pedagogues, instrumental players, ethnoorganology) and bioacoustics (analysis of a recording of birdsong, together with the Hungarian ornithologist Péter Szőke).
In musicology he promoted the creative use of natural science (mathematics, logic, theories of information, cybernetics). Apart from pedagogical and scholarly work, he belonged to a musical ensemble, playing the cello as a member of the so-called KAF trio (Ladislav Kupkovič, Ján Albrecht, Miroslav Filip).
He is the author of several patented inventions (he developed a melograph for the needs of ethnomusicology, worked on the building of the first musico-acoustic laboratory in Slovakia in the Musical Department of the Slovak National Museum’s Historical Institute, collaborated with the Research Enumeration Centre of Comenius University in Bratislava, etc.).