Abstract: An apparatus for operating a tuba comprises a board facilitating mounting one or more foot pedal units. Each foot pedal unit is connected to at least one rotary valve of the tuba, and comprises a pedal mounted to a frame using a drive unit and a chain. The chain is configured to run over a pulley member and is coupled at top portion of the frame. Upon pressing the pedal in sync with air supplied at mouthpiece of the tuba by a user, the chain is pulled through the pulley member causing a mallet shaped shaft to move in upward or downward direction. The movement of the mallet shaped shaft is configured to control movement of a paddle of at least one rotary valve via a cable for enabling the user to play all chromatic notes available within the tuba's range.