Violin where a stopped note sounds a unison or octave with another (open) string, causing it to resonate sympathetically. Students often use these ringing tones to check the intonation of the stopped note by seeing if it is harmonious with the open string. For example, when playing the stopped pitch "A" on the G string, the violinist could play the open D string at the same time, to check the intonation of the stopped "A". If the "A" is in tune, the "A" and the open D string should produce a harmonious perfect fourth. Violins are tuned in perfect fifths, like
Violin technique and is best executed with a sinuous movement of the bow arm. Sometimes the same pitch as an open string will be fingered on an adjacent string, so that the alternation is between the same note on two strings, one stopped, one open, giving a rhythmic pulsating effect. Bariolage was a favorite device of Joseph Haydn, who used it for example in his string quartet Opus 50 no. 6, and in the "Farewell" Symphony. It is also prominently featured in the Preludium of Bach's Partita No.3 in E major for solo violin. Playing an open string simultaneously with a stopped