Standing posture is best to move air. It diminishes till supine position Posture effect inhalation not exhalation. Gradually lessen and keep ball suspended for longer time. Control ball this will control breath. Greatest results, least effort.
Suction is stimuli to extend diaphragm.
Pressure low, Flow high. Forcing causes loss of fundamental and exaggeration of overtones. Large quantity of air at low pressure. Do to it's large size it reduces air flow we need to make most music. Use minimal motors.