a voilin is always stored with its string loosened to present them from snapping. when it is being tuned the strings are tightened gradually. what effect does this have on the pitch of the note produced.
The frequency of an oscillation determines the pitch of a sound. If the frequency of vibration is higher and the sound produced will have a high pitch. Similarly, if the frequency of oscillations is small then, the sound produced will have a low pitch. When the string is tightened the frequency of vibrations increases.