Mikl�瀛 R�爆sa ( 1907 – 1995 ) is the 20th century composer, he composed many works in his life. However, the achievement of writing scores for film music is better than the instrument music a lot. But, R�爆sa still kept writing the classic music for the instrument works.

Nowadays, Sonatina for Clarinet Solo, op. 27 is more and more loved to be performed in the concert programs. In this thesis, it will discuss the influence of the environment on his unique music style. During the childhood in Hungary, studying in German, staying in France and England, and settling in America, he was determined to be a composer. These rich experiences could be felt in his works. Especially the memories about the Hungarian Peasant folk song in his childhood, it affected R�爆sa’s music style most. Therefore, this thesis will introduce the background of Hungarian music culture generally in Chapter 2, Section 1, and then the biography and music style. In Chapter 3, the analysis will be divided into three parts: Hungarian folk tune style and dance rhythm, form structure, using of modes. Eventually, it will generalize the Hungarian folk features used in this work, and then search appropriate and complete interpretation.