Workbook designed for students of fourth year at music school, with transparently processed music theory with visual explanations of terms and assignments, from simple examples to more demanding tasks. There are exercises for writing notes, scale and repetition of musical terms, rhythmic exercises, a variety of musical puzzles and crosswords, basic information about musical instruments and orchestras. This workbook follows and adds on Hudobná náuka 3 workbook. Workbook is accompanied by graphic symbols and pictures. Published in the Slovak language.