Synchronizing signal generator for musical instrument

A synchronized sound recording and reproducing system including

• (a) sound information recording and reproducing means for receording base sound information and time code information on a recording medium and reproducing the base sound information therefrom, said recording medium being movable with respect to said sound information recording and reproducing means, said time code information being representative of different physical locations on said recording medium, said locations being arranged in the direction of movement of the recording medium, said sound information recording and reproducing means being operative to reproduce said time code information substantially in synchronism with said base sound information,
• (b) base sound generating means for generating base sounds on the basis of the base sound information reproduced by said sound information recording and reproducing means,
• (c) beat signal generating means for generating a beat signal each time the beat signal generating means is actuated,
• (d) synthesized-sound signal generating means operative to have additional sound information memorized therein and to reproduce the stored additional sound information in accordance with a time base expressed by synchronizing signals providing tempo information, and
• (e) additional-sound synthesizing means for synthesizing and generating additional sounds on the basis of the additional sound information reproduced by said synthesized-sound signal generating means,
• comprising in combination
• (A) beat interval determining means for determining beat intervals on the basis of the time code information reproduced by said sound information recording and reproducing means and the beat signals generated by said beat signal generating means
• (B) beat interval memorizing means for storing values respectively representative of the beat intervals determined by said beat interval determining means and allowing the stored values to be successively read out therefrom when required,
• (C) playback start location determining means for determining a first particular physical location on said recording medium as the location at which playback operation is to be started by said sound information recording and reproducing means, said first particular physical location corresponding to the first one of the beat signals produced by said beat signal generating means, said playback start location determining means determining said first particular physical location in response to said first one of the beat signals and to said time code information reproduced by said sound information recording and reproducing means,
• (D) playback start location memorizing means for memorizing a value representative of said first particular physical location of said recording medium,
• (E) intervening-playback start location determining means for summing values respectively representative of the beat intervals between the beat signals read out in succession from said beat interval memorizing means until the value resulting from the summation exceeds a value which corresponds to the time code information which is reproduced by the information recording and reproducing means and which is indicative of a second particular physical location on said recording medium, the intervening-playback start location determining means determining, on the basis of said value resulting from the summation, a value representing said particular physical location on the tape, said second particular physical location being spaced apart from said first particular physical location forwardly in the direction of movement of said recording medium with respect to said recording and reproducing means,
• (F) synchronized intervening-playback start time determining means for determining the point of time at which synchronized playback operation is to be started by said sound information recording and reproducing means and said additional-sound synthesizing means, said synchronized intervening-playback start time determining means determining said point of time when a value representative of said second particular physical location on said recording medium as indicated by said time code information reproduced by said sound information recording and reproducing means is substantially equalized with said value representative of said first particular physical location memorized by said playback start location memorizing means, and
• (G) tempo information generating means which is to become active at said point of time for generating tempo information on the basis of the values successively read out from said beat interval memorizing means and supplying the tempo information as said synchronizing signals to said synthesized-sound signal generating means to enable the synthesized-sound signal generating means to reproduce said additional sound information and said additional-sound synthesizing means to generate said additional sounds in synchronism with the base sounds generated by said base sound generating means.

A synchronized sound recording and reproducing system including

• (a) sound information recording and reproducing means for recording base sound information and time code information on a recording medium and reproducing the base sound information therefrom, said recording medium being movable with respect to said sound information recording and reproducing means, said time code information being representative of different physical locations on said recording medium, said locations being arranged in the direction of movement of the recording medium, said sound information recording and reproducing means being operative to reproduce said time code information substantially in synchronism with said base sound information,
• (b) base sound generating means for generating base sounds on the basis of the base sound information reproduced by said sound information recording and reproducing means,
• (c) beat signal generating means for generating a beat signal each time the beat signal generating means is actuated,
• (d) synthesized-sound signal generating means operative to have additional sound information memorized therein and to reproduce the stored additional sound information in accordance with a time base expressed by synchronizing signals providing tempo information, and
• (e) additional-sound synthesizing means for synthesizing and generating additional sounds on the basis of the additional sound information reproduced by said synthesized-sound signal generating means,
• comprising in combination
• (A) beat interval determining means for determining beat intervals on the basis of the time code information reproduced by said sound information recording and reproducing means and the beat signals generated by said beat signal generating means,
• (B) beat interval memorizing means for storing values respectively representative of the beat intervals determined by said beat interval determining means and allowing the stored values to be successively read out therefrom when required,
• (C) playback start location determining means for determining a particular physical location on said recording medium as the location at which playback operation is to be started by said sound information recording and reproducing means, said particular physical location corresponding to the first one of the beat signals produced by said beat signal generating means, said playback start location determining means determining said particular physical location in response to said first one of the beat signals and to said time code information reproduced by said sound information recording and reproducing means,
• (D) playback start location memorizing means for memorizing a value representative of said particular physical location of said recording medium,
• (E) preliminary solo beat number memory means for memorizing a preset number of beats to be reserved for preliminary solo mode of operation to be performed by said synthesized-sound signal generating means and said additional-sound synthesizing means,
• (F) preliminary-solo start location determining means for subtracting from a value representative of said particular physical location at which the playback operation is to be started a value resulting from multiplication of a value representative of the time interval between the first two of said beat signals by said preset number of beat signals memorized in said preliminary solo beat number memory means, said preliminary-solo start location determining means determining, as a result of the subtraction, a value indicative of the location on the recording medium at which the preliminary solo mode of operation is to be started by said synthesized-sound signal generating means,
• (G) preliminary-solo start time determining means for determining the point of time at which the preliminary solo mode of operation is to be started by said synthesized-sound signal generating means and said additional-sound synthesizing means, the preliminary-solo start time determining means determining said point of time when the value determined by said preliminary-solo start location determining means as being indicative of the location on the recording medium at which the preliminary solo mode of operation is to be started is substantially equalized with the value representing the time code indicative of said particular physical location on said recording medium,
• (H) preliminary-solo beat interval determining means for determining, as representing an effective preliminary-solo beat interval, a value representative of the time interval between the first two of said beat signals as each of the beat signals is generated by said beat signal generating means during a period of time intervening between the time when the value representing a time code indicative of a location on the tape exceeds the value indicative of said particular physical location of the recording tape at which the preliminary solo mode of operation is to be started and the time when the value representing a time code indicative of a location on the tape is substantially equalized with the value indicative of said particular physical location at which the playback operation is to be started, and
• (I) tempo information generating means which is to become active at said point of time at which the preliminary solo mode of operation is to be started, the tempo information generating means being active to generate tempo information on the basis of the values determined as the effective preliminary-solo beat interval by said preliminary-solo beat interval determining means the values successively read out from said beat interval memorizing means, said tempo information generating means being further active to supply the tempo information as said synchronizing signals to said synthesized-sound signal generating means to enable the synthesized-sound signal generating means to reproduce said additional sound information and said additional-sound synthesizing means to generate said additional sounds in synchronism with the base sounds generated by said base sound generating means.