In order to create sound on this instrument, you must create a vibration of the strings. Whether it's plucking the strings by hand or placing a bow across the different strings. The vibration travels through the strings to the bridge and sound post at the bottom of the instrument. This allows the sound to radiate in the air. The tension in the strings, increasing the tension = a higher frequency, bow, and construction of the body all control the loudness and tonal quality of the sound. Increasing the tension of the string, known as tuning the instrument, can be done by the fine tuners located on the sound post or the pegs, located at the top of the instrument.