Violin Making workshop with Master Liu Zhao Yang. What part of the violin are they studying and creating? The bassbar. The bassbar is a spruce wood bar, positioned longitudinally and glued to the inside of the board, passing under the bridge. Its function is intended to be of support and is crucial for the final rendering of the violin ????. With the passage of time its structure tends to lose nerve, causing the violin top to lower and causing the lower notes of the instrument to lose strength. You must be very careful and carefully consider when to replace it.