Tone information processing device for an electronic musical instrument

• US 4,681,008 A
• Filed: 07/29/1985
• Issued: 07/21/1987
• Est. Priority Date: 08/09/1984
• Status: Expired due to Term

• Current Assignee: Casio Computer Company Limited
• Original Assignee: Casio Computer Company Limited
• Inventors: Sasaki, Hiroyuki, Morikawa, Shigenori, Morokuma, Hiroshi, Hanzawa, Kohtaro
• Primary Examiner(s): Grimley, A. T.
• Assistant Examiner(s): Warren, David
• Application Number:
  US06/760,290
• Time in Patent Office: 722 Days
• Field of Search: 84/1.01, 84/1.28, 84/1.03, 84/DIG. 29
• US Class Current: 84/603
• CPC Class Codes: G10H 1/0033 Recording/reproducing or transmission of music for electrophonic musical instruments
• CPC Class Codes: G10H 1/0041 in coded form
• CPC Class Codes: G10H 1/186 Microprocessor-controlled keyboard and assigning means
• CPC Class Codes: G10H 2250/325 Birds
• CPC Class Codes: G10H 7/02 in which amplitudes at successive sample points of a tone waveform are stored in one or more memories
• CPC Class Codes: G10H 7/04 in which amplitudes are read at varying rates, e.g. according to pitch
• CPC Class Codes: Y10S 84/18 Tuning

Abstract

External sound signal coupled through a MIC IN terminal is fed through an operating switch panel section to an A/D converter for conversion to a digital signal. The digital signal is stored in a record memory through a waveform R/W controller under the control of a CPU. The digital signal stored in the record memory is read out from the CPU according to control data stored in a work memory to be fed to an external sound system for sounding.

Claims

1. A tone information processing device for an electronic musical instrument, comprising:

analog-to-digital converting means for converting at least one analog external sound waveform signal into a digital waveform signal which represents a waveform corresponding to the waveform of said external sound waveform signal;

memory means for recording said digital waveform signal as outputted from said analog-to-digital converting means;

reading means for reading out said digital waveform signal recorded in said memory means at a rate corresponding to a designated tone frequency of a particular note;

digital-to-analog converting means for converting the digital waveform signal read out from said memory means into an analog sound signal which has the waveform determined by said digital waveform signal;

note frequency designating means coupled to said reading means for designating a pitch of the sound produced based on the analog sound signal derived from said digital-to-analog converting means; and

determining means coupled to said memory means and said reading means for determining start and end addresses of reading of said digital waveform signal recorded in said memory means in relation to the waveform of said digital waveform signal.

15. The tone information processing device according to claim 1, wherein said control means includes ready-to-record state setting means for setting a ready-to-record state, first recording means for repeatedly recording a first external sound signal in a first predetermined block of said record memory means in said ready-to-record state, trigger means for setting an actual recording state, second recording means for recording a second external signal in a second predetermined block other than said first predetermined block of said record memory means when said actual recording state is set by said trigger means and third recording means for recording said first external sound signal recorded in said first predetermined block of said record memory means and said second external sound signal recorded in said second predetermined block in a designated rearranged sequence in said record memory means.

2. A tone information processing device for an electronic musical instrument, comprising:

analog-to-digital converting means for converting an analog external sound waveform signal into a digital waveform signal which represents a waveform corresponding to the waveform of said external sound waveform signal;

record memory means for recording said digital waveform signal as outputted from said analog-to-digital converting means;

reading means for reading out said digital waveform signal recorded in said record memory means at a rate corresponding to a designated tone frequency of a particular note;

digital-to-analog converting means for converting the digital waveform signal read out from said record memory means into an analog sound signal which has the waveform determined by said digital waveform signal;

note frequency designating means coupled to said reading means for designating a pitch of the sound produced based on the analog sound signal derived from said digital-to-analog converting means; and

setting means coupled to said record memory means for setting start and end addresses of reading of said digital waveform signal recorded in said record memory means substantially at zero crossing points of said waveform signal.

3. The tone information processing device according to claim 2, wherein said device includes designating means for designating start and end addresses of reading out said digital waveform signal in said record memory means and wherein said reading means includes means for repeatedly reading out a portion of the digital waveform signal by repeatedly designating addresses between said designated start and end addresses.

4. The tone information processing device according to claim 2, wherein said reading means includes a CPU, a work memory for storing data used for a control operation of said CPU and a waveform R/W controller coupled to said record memory means and said CPU.

6. The tone information processing device according to claim 4, wherein a recording area, tone pitch, keyboard width, key touch, envelope and note pitch of a plurality of digital waveform signals recorded in said record memory means are stored in said work memory.

7. A tone information processing device for an electronic musical instrument, comprising:

analog-to-digital converting means for converting an external sound waveform signal into a digital waveform signal;

record memory means for recording said digital waveform signal;

reading means for reading out said digital waveform signal recorded in said record memory means at a determined rate;

digital-to-analog converting means for converting the digital waveform signal read out from said record memory means into an analog sound signal which has the waveform determined by said digital waveform signal; and

allotment designating means coupled to said reading means for designating an allotment of a particular note to the pitch of said sound waveform signal recorded in said record memory means,

said reading means including means for reading out the digital waveform signal from said record memory means at a rate which is determined by the particular note allotted by said allotment means and also a designated note corresponding to a sequence of a musical performance.

8. A tone information processing device for an electronic musical instrument, comprising:

analog-to-digital converting means for converting an external sound waveform signal into a digital waveform signal;

record memory means for recording a plurality of different digital waveform signals obtained through analog-to-digital conversion of a plurality of external sound waveform signals by analog-to-digital converting means in different areas;

coupling means for coupling a specified range of at least one parameter to each of the plurality of different digital waveform signals;

inputting means for inputting a value of said at least one parameter according to a musical performance;

judging means for judging a range to which said inputted value of the parameter belongs;

selecting means for selecting one of said plurality of digital waveform signals corresponding to a judged result of said judging means so as to read out the one of said plurality of digital waveform signals from said record memory means;

reading means for reading out said one of digital waveform signals from said record memory means selected by said selecting means at a rate corresponding to a designated tone frequency of a particular note; and

digital-to-analog converting means for converting said selected digital waveform signal read out from said record memory means by said reading means into an analog sound signal which has the waveform determined by said digital waveform signal and has the designated frequency.

5. The tone information processing device according to claim 10, wherein said waveform R/W controller has a multiple channel structure for providing address signals to said record memory means on a time division basis.

9. The tone information processing device according to claim 8, which further comprises display means for displaying areas of said record memory means corresponding to said plurality of recorded digital waveform signals.

10. The tone information processing device according to claim 9, wherein said record memory means includes a plurality of blocks and said display means has a plurality of display elements corresponding to said respective blocks.

11. A tone information processing device for an electronic musical instrument, comprising:

converting means for converting a waveform signal into a digital signal;

record memory means for recording said digital signal representing the waveform; and

control means for controlling recording of said digital signal in said record memory means and for converting the recorded digital signal into a sound signal having a designated frequency, said control means including

setting means for setting start and end addresses for reading of said digital signal recorded in said record memory means at substantially zero crossing points of said waveform signal,

said address setting means including incrementing means for incrementing the designated address of said record memory means, detecting means for detecting the polarity of the value of the digital signal in the designated address according to the increment of the designated address, comparing means for comparing the value of the digital signal with a predetermined value when a change in the polarity of the digital signal is detected by said detecting means, and storing means for storing as said start and end addresses of the record memory means addresses corresponding to values of the waveform when the waveform values are smaller than said predetermined value as compared by said comparing means.

12. The tone information processing device according to claim 11, wherein said detecting means includes means for detecting one of the states wherein the polarity of the value of said digital signal changes from negative to positive and wherein the polarity changes from positive to negative, and said comparing means includes means for comparing the value of said digital signal with said predetermined value when said detecting means detects said one of said states.

13. The tone information processing device according to claim 11, wherein said control means includes reading means for repeatedly reading out a portion of said digital signal by repeatedly designating addresses between said start and end addresses of said record memory means.

14. The tone information processing device according to claim 11, wherein said address setting means includes a CPU and a work memory for storing data used for a control operation of said CPU, and said control means includes a waveform read/write (R/W) controller coupled to said memory means and said CPU.

16. The tone information processing device according to claim 14, wherein said waveform R/W controller comprises a multiple channel structure for providing address signals to said record memory means on a time division basis.

17. A tone information processing device for an electronic musical instrument, comprising:

converting means for converting a waveform signal into a digital signal;

record memory means for recording said digital signal representing the waveform; and

control means for controlling recording of said digital signal in said record memory means and for converting the recorded digital signal into a sound signal having a designated frequency, said control means including

setting means for setting start and end addresses for reading of said digital signal recorded in said record memory means at substantially zero crossing points of said waveform signal,

said control means including ready-to-record state setting means for setting a ready-to-record state, first recording means for repeatedly recording a first external sound signal in a first predetermined block of said record memory means in said ready-to-record state, trigger means for setting an actual recording state, second recording means for recording a second external signal in a second predetermined block other than said first predetermined block of said record memory means when said actual recording state is set by said trigger means, and third recording means for recording said first external sound signal recorded in said first predetermined block of said record memory means and said second external sound signal recorded in said second predetermined block in a designated rearranged sequence in said record memory means.

18. A tone information processing device for an electronic musical instrument, comprising:

analog-to-digital converting means for converting at least one external sound waveform signal into a digital waveform signal;

memory means for recording said digital waveform signal;

reading means for reading out said digital waveform signal recorded in said memory means at a rate corresponding to a note frequency; and

allotment designating means for allotting a particular note to the pitch of said converted external sound waveform,

said reading means including means for reading out said digital waveform signal from said memory means at a rate which is determined by the particular note allotted by said allotment designating means and the designated note according to sequence of a musical performance.

19. The tone information processing device according to claim 18, wherein said allotment designating means includes a CPU, and a work memory for storing data used for control operation of said CPU, and said reading means includes a waveform R/W controller coupled to said memory means and to said CPU.

20. The tone information processing device according to claim 19, wherein said waveform R/W controller comprises a multiple channel structure for providing address signals to said memory means on a time division basis.

21. The tone information processing device according to claim 18, wherein said device comprises control means for recording said external sound waveform signal in said memory means and including ready-to-record state setting means, first recording means for repeatedly recording a first external sound signal in a first predetermined block of said memory means in said ready-to-record state, trigger means for setting an actual recording state, second recording means for recording a second external signal in a second predetermined block other than said first predetermined block of said memory means when said actual recording state is set by said trigger means, and third recording means for recording said first external sound signal recorded in said first predetermined block of said memory means and said second external sound signal recorded in said second predetermined block in a designated rearranged sequence in said memory means.

22. A tone information processing device for an electronic musical instrument, comprising:

analog-to-digital converting means for converting at least one external sound waveform signal into a digital waveform signal;

memory means for recording said digital waveform signal, said memory means recording a plurality of different digital waveform signals in different areas derived from an analog-to-digital conversion of external sound waveform signals;

reading means for reading out said digital waveform signal recorded in said memory means at a rate corresponding to a note frequency;

setting means for setting a plurality of ranges of at least one parameter, each of the ranges designating one of said plurality of different signals;

inputting means for inputting a parameter according to the musical performance;

judging means for judging a range to which said inputted parameter belongs; and

selecting means for selecting one of said plurality of digital waveform signals corresponding to a judged result of said judging means to read out one of said plurality of digital waveform signals from said memory means.

23. The tone information processing device according to claim 22, comprising display means for displaying areas of said memory means corresponding to said plurality of recorded digital waveform signals.

24. The tone information processing device according to claim 23, wherein said memory means includes a plurality of blocks and said display means comprises a plurality of display elements corresponding to said respective blocks.

25. The tone information processing device according to claim 23, wherein said ranges of at least one parameter are determined by a note of a musical performance.

26. The tone information processing device according to claim 23, wherein said ranges of at least one parameter are determined by a key touch of a key operation for a musical performance.

27. The tone information processing device according to claim 22, wherein said judging means include a CPU and a work memory for storing data used for control operation of said CPU, and said reading means includes a waveform R/W controller coupled to said memory means and to said CPU.

28. The tone information processing device according to claim 27, wherein said waveform R/W controller comprises a multiple channel structure for providing address signals to said memory means on a time division basis.

29. The tone information processing device according to claim 27, wherein the recording area, tone pitch, keyboard width, key touch, envelope and note pitch of a plurality of external sounds recorded in said memory means are stored in said work memory.

30. The tone information processing device according to claim 22, wherein said device comprises control means for recording said external sound waveform signal in said memory means including ready-to-record state setting means, first recording means for repeatedly recording a first external sound signal is a first predetermined block of said memory means in said ready-to-record state, trigger means for setting an actual recording state, second recording means for recording a second external signal in a second predetermined block other than said first predetermined block of said memory means when said actual recording state is set by said trigger means, and third recording means for recording said first external sound signal recorded in said first predetermined block of said memory means and said second external sound signal recorded in said second predetermined block in a designated rearranged sequence in said memory means.