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The purpose of this study was to elucidate the role of auditory feedback derived from one keystroke in the control of the rhythmicity and velocity of successive keystrokes during piano playing. We examined the effects of transient auditory perturbations with respect to the pitch, loudness, and timing of one tone on subsequent keystrokes while six pianists played short excerpts from three simple musical pieces having different tempi ("event rates"). Immediately after a delay in tone production, the inter-keystroke interval became shorter. This compensatory action depended on the tempo, being most prominent at the medium tempo. This indicates that temporal information provided by auditory feedback is utilized to regulate the timing of movement elements produced in a sequence. We also found that the keystroke velocity changed after the timing, pitch, or loudness of a tone was altered, although the response differed depending on the type of perturbation. While delaying the timing or altering the pitch led to an increase in the velocity, altering the loudness changed the velocity in an inconsistent manner. Furthermore, perturbing a tone elicited by the right hand also affected the rhythmicity and velocity of keystrokes with the left hand, indicating that bimanual coordination of tone production was maintained. Finally, altering the pitch sometimes resulted in striking an incorrect key, mostly in the slow piece, emphasizing the importance of pitch information for accurate planning and execution of sequential piano keystrokes.

Role of auditory feedback in the control of successive keystrokes during piano playing