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 possible, the amount of adjustment needed may be greatly reduced by training the fingers to fall properly in the first place. That said, a quote widely attributed to Jascha Heifetz goes something like: "I play as many wrong notes as anyone, but I fix them before most people can hear them." The fingers are conventionally numbered 1 (index finger) to 4 (little finger). Especially in instructional editions of violin music, numbers over the notes may indicate which finger to use, with "0" above the note indicating "open" string, or playing on a string without manipulating the pitch using the left