Level IV of The Singing Violin introduces the second and third positions, with emphasis on the different types of shifts and shifting techniques. The acoustics and playing techniques of harmonics are explored, and the study of vibrato continues.The musical selection encompass classical music of the major stylistic periods, and folk music of Germany, Italy, Russia, Scotland, and Greece. More advanced rhythms and meters include the "scotch snap", unequal metric patterns, and alla breve. Theroretical attention is given to major and minor thirds and modal melody. Included are practical aspects of tuning and changing strings,