Electronic musical instrument having system for judging player's performance

An electronic musical instrument comprising:

• memory means for storing exemplary performance data representative of progression of notes of a musical piece and corresponding to key operations to be effected on a keyboard to play the musical piece;
• readout control means coupled to said memory means for reading said performance data sequentially out of said memory means in accordance with the progression of the musical piece;
• keyboard means responsive to key operations to produce musical performance signals corresponding to musical notes;
• and
• key operation judging circuit means coupled to said keyboard means for comparing said musical performance signals produced by said keyboard means with said performance data read out of said memory means to detect whether or not each of said key operations is correctly effected on said keyboard means in accordance with the respective performance data read out of said memory means;
• said readout control means including means for reading performance data indicative of the pitch of a note out of said memory means after the elapse of a period of time corresponding to the duration of a preceding note from the readout of performance data indicative of the pitch of said preceding note;
• and
• said key operation judging circuit means including:
• pitch comparison circuit means for effecting a comparison between performance data indicative of the pitch of a note read out of said memory means and a performance signal of said keyboard means indicative of the pitch of a note of an operated key;
• and
• duration comparison circuit means for effecting a comparison between a time interval corresponding to the duration data of a given note and a time interval beginning from the time of a key depression operation corresponding to said given note to a succeeding key release operation on said keyboard means.

An electronic musical instrument comprising:

• memory means for storing exemplary performance data representative of progression of notes of a musical piece and corresponding to key operations to be effected on a keyboard to play the musical piece;
• readout control means coupled to said memory means for reading said performance data sequentially out of said memory means in accordance with the progression of the musical piece;
• keyboard means responsive to key operations to produce musical performance signals corresponding to musical notes;
• and
• key operation judging circuit means coupled to said keyboard means for comparing said musical performance signals produced by said keyboard means with said performance data read out of said memory means to detect whether or not each of said key operations is correctly effected on said keyboard means in accordance with the respective performance data read out of said memory means;
• said key operation judging circuit means including:
• comparison means for effecting a comparison between a timing of readout of performance data corresponding to a note from said memory means and a timing of operation of a key corresponding to said note on said keyboard means;
• and
• tolerance setting means coupled to said comparison means for establishing a tolerance for said comparison effected by said comparison means, said key operation judging circuit means judging a key operation as correct when a difference between said readout timing and said key operation timing is within said tolerance established by said tolerance setting means.