Pitch adjustment for a valve brass musical instrument

A musical instrument including:

• a main tube for receiving air flow;
• at least three valves connected to the main tube, each valve having an associated additional tube wherein each of the valves is movable from a first position in which air flow bypasses the additional tube associated with the valve and a second position in which air passes through the additional tube associated with the valve to control the pitch of the instrument;
• at least two of the three additional tubes having a tuning slide and a fixed portion that is fixed relative to the main tube;
• at least two actuators, each actuator for one of the additional tubes having a tuning slide, and each actuator being connected between the fixed portion of the additional tube and the tuning slide, and each actuator moving the tuning slide to which it is connected by a predetermined distance when the actuator is energized;
• a sensor connected to each of the at least three valves and providing a signal when the valve to which the sensor is connected is in the second position;
• and
• a controller and a power source operably connected to the sensors and the actuators, wherein the controller directs power to and energizes at least one of the at least two actuators when the controller receives a signal from at least two of the sensors indicating that the valve to which each of the two sensors is connected is in the second position.