The four small-scale preludes of Miloslav Kabelác’s op. 48 were commissioned in 1966 by the second “Prague Spring International Music Competition” in the category organ.

They are written in proportional notation, which the composer preferred ever since his Symphony No. VI of 1961. For practical reasons one of the editors, the leading Czech organist and Kabelác authority Jan Hora, has transcribed the graphic notation of the note-values into standard notation. The original musical text appears in a complete reproduction of the first edition of 1966, along with examples in facsimile.