Concert pianos, on the other hand, are tuned once or twice daily. But, says Bruce Brubaker, Chair Piano at the New England Conservatory, the self-tuning piano might not help. Aside from tuning, two key factors to a piano's sound are voicing, which impacts the tone, and regulation, which changes how heavy the keys feel. In concert pianos, technicians often service the tuning, voicing and regulation, says Brubaker. While technicians tune more often than anything else, an automatic tuner wouldn't totally replace them. Changes in a piano's sound due to room size and temperature could also require extra service.