System and method for supporting an adlib performance

A music performance assisting system comprising:

• a performance operator section including a plurality of performance operating members corresponding to different tone pitches;
• a display section including a plurality of display units corresponding to said performance operating members;
• a musical key designation section which designates a desired musical key;
• a chord designation section which designates a chord varying with a desired chord progression;
• a determination section which determines, in response to the chord designated by said chord designation section, and depending on which one of major and minor musical keys the musical key designated by said musical key designation section is, at least two groups of tone pitches, one group that are always available for the chord and another group that are temporarily available for the chord, respectively;
• and
• a display control section which performs control to allow respective forms of display of said display units to differ from each other, depending on whether or not said performance operating members corresponding to said display units correspond to one of the two groups of tone pitches determined by said determination section and which one of the two groups of tone pitches said performance operating members correspond to.

A music performance assisting system comprising:

• a performance operator section including a plurality of performance operating members corresponding to different tone pitches;
• a display section including a plurality of display units corresponding to said performance operating members;
• a supply section which supplies automatic performance information containing at least chord information for designating a chord varying with a predetermined chord progression;
• a determination section which determines, in response to the chord designated by said chord information, at least two groups of tone pitches, one group that are always available for the chord and another group that are temporarily available for the chord, respectively;
• a detection section which detects respective frequencies of use of tone pitches in the automatic performance information supplied by said supply section for each chord period when one chord is designated by said chord information;
• and
• a display control section which performs control to allow respective forms of display of said display units to differ from each other, depending on whether or not said performance operating members corresponding to said display units correspond to one of the two groups of tone pitches and which one of the two groups of tone pitches said performance operating members correspond to, and also in accordance with the frequencies of use detected by said detection section for the tone pitches of the same group.

A music performance assisting system comprising:

• a performance operator section including a plurality of performance operating members corresponding to different tone pitches;
• a display section including a plurality of display units corresponding to said performance operating members;
• a supply section which supplies automatic performance information containing at least musical key information for designating a musical key and chord information for designating a chord varying with a predetermined chord progression;
• a determination section which determines, in response to the chord designated by said chord information, and depending on which one of major and minor musical keys the musical key designated by said musical key information is, at least two groups of tone pitches, one group that are always available for the chord and another group that are temporarily available for the chord, respectively;
• a detection section which detects respective frequencies of use of tone pitches in the automatic performance information supplied by said supply section for each chord section where one chord is designated by chord information;
• and
• a display control section which performs control to allow respective forms of display of said display units to differ from each other, depending on whether or not said performance operating members corresponding to said display units correspond to one of the two groups of tone pitches determined by said determination section and which one of the two groups of tone pitches said performance operating members correspond to, said display control section also allowing the forms of display of said display units corresponding to the tone pitches of the same group to differ from each other in accordance with the frequencies of use detected by the detection section.

A method of indicating a performance key to be operated for a music performance operating device including a plurality of performance keys corresponding to musical notes and display units corresponding to said performance keys, said method comprising the steps of:

• receiving chord information;
• for a chord designated by the received chord information, defining at least first and second groups of musical notes in such a manner that said first group contains musical notes always available for said chord and said second group contains musical notes temporarily available for said chord;
• and
• operating said display units for the performance keys, corresponding to said first and second groups of musical notes, in particular forms of display that are different between said first and second groups.

A method of indicating a performance key to be operated for a music performance operating device including a plurality of performance keys corresponding to musical notes and display units corresponding to said performance keys, said method comprising the steps of:

• receiving automatic performance information containing chord information;
• for a chord designated by the received chord information, defining at least first and second groups of musical notes in such a manner that said first group contains musical notes always available for said chord and said second group contains musical notes temporarily available for said chord;
• on the basis of the automatic performance information, detecting respective frequencies of use of musical notes in a performance section corresponding to the received chord information;
• and
• operating said display units for the performance keys, corresponding to said first and second groups of musical notes, in particular forms of display that are different between first and second groups, with the forms of display of said display units corresponding to the tone pitches of the same group controlled to differ from each other in accordance with the frequencies of use detected by the detection device.

A machine-readable recording medium containing a group of instructions to cause said machine to implement a method of indicating a performance key to be operated in a music performance operating device including a plurality of performance keys corresponding to musical notes and display units corresponding to the performance keys, said method including the steps of:

• receiving chord information;
• for a chord designated by the received chord information, defining at least first and second groups of musical notes in such a manner that said first group contains musical notes always available for said chord and said second group contains musical notes temporarily available for said chord;
• and
• operating said display units for the performance keys, corresponding to said first and second groups of musical notes, in particular forms of display that are different between said first and second groups.

A machine-readable recording medium containing a group of instructions to cause said machine to implement a method of indicating a performance key to be operated in a music performance operating device including a plurality of performance keys corresponding to musical notes and display units corresponding to the performance keys, said method including the steps of:

• receiving automatic performance information containing chord information;
• for a chord designated by the received chord information, defining at least first and second groups of musical notes in such a manner that said first group contains musical notes always available for said chord and said second group contains musical notes temporarily available for said chord;
• on the basis of the automatic performance information, detecting respective frequencies of use of musical notes in a performance section corresponding to the received chord information;
• and
• operating said display units for the performance keys, corresponding to said first and second groups of musical notes, in particular forms of display that are different between said first and second groups, with the forms of display of said display units corresponding to the tone pitches of the same group controlled to differ from each other in accordance with the frequencies of use detected by the detection devices.