It is surely not difficult for anyone with experience in thesubject known as Music Theory to realize that there is avery definite and precise relationship between music andmathematics. This paper describes the SoriSu, a newelectronic musical instrument based on Sudoku puzzles,which probe the expressive possibilities of mathematicalconcepts in music. The concept proposes a new way ofmapping numbers to sound. This interface was designed toprovide easy and pleasing access to music for users whoare unfamiliar or uncomfortable with current musicaldevices. The motivation behind the project is presented, aswell as hardware and software design.