Claims
- 1. A tremulant system for electrical musical instruments comprising:
- a plurality of tone generators each capable of producing at least some of the notes of a musical scale;
- n transmission channels each having an input and an output;
- a plurality of loudspeakers connected respectively to the outputs of said transmission channels;
- n vibrato units each connected between the input and output terminals of a respective one of said transmission channels;
- each vibrato unit having a control terminal;
- means for causing each of said vibrato units to modulate signals applied to its respective channel in response to a driving signal applied to its control terminal;
- n driving signals applied respectively to said control terminals;
- said driving signals having phase relationships that differ by approximately 360.degree./n;
- first matrixing means for combining signals from each of said plurality of tone generators in one phase relationship and applying said matrixed signals to at least one of said n channels;
- and second matrixing means for combining signals from each of said plurality of tone generators in a different phase relationship and applying said differently matrixed signals to at least a different one of said n channels.
- 2. A tremulant system according to claim 1 wherein n=4, and wherein the combined signals from the first matrixing means are applied to two of said transmission channels and the combined signals from said second matrixing means are applied to the other two of said transmission channels.
- 3. A tremulant system according to claim 1 with additional amplitude modulation means for imparting amplitude modulation to the signals in at least one of said transmission channels.
- 4. A tremulant system according to claim 1, wherein said first matrixing means comprises:
- a first operational amplifier having an inverting input, a non-inverting input, and an output;
- means connecting tone signals from all of said tone generators to the non-inverting input of said first operational amplifier; and
- means connecting said output of said first operational amplifier to at least one of said n channels.
- 5. A tremulant system according to claim 4, wherein said second matrixing means comprises:
- a second operational amplifier having an inverting input, a non-inverting input, and an output;
- means connecting tone signals from each of said tone generators to selected ones of said inverting and non-inverting inputs of said second operational amplifier; and
- means connecting said output of said second operational amplifier to at least a different one of said n channels.
- 6. A tremulant system according to claim 1, wherein said first matrixing means comprises a first operational amplifier having at least a non-inverting input and means connecting tone signals from each of said plurality of tone generators to said non-inverting input of said first operational amplifier, and wherein said second matrixing means comprises a plurality of operational amplifiers each having an inverting and a non-inverting input and means connecting tone signals from each of said plurality of tone generators to each of said plurality of operational amplifiers, the tone signals from each tone generator being applied to a selected one of said inverting and non-inverting inputs for each of said plurality of operational amplifiers.
- 7. A tremulant system according to claim 1, wherein n= 4, wherein said first matrixing means combines said signals in a first phase relationship and applies its matrixed signals to a first one of said channels, and wherein said second matrixing means combines said signals in a second phase relationship and applies its matrixed signals to a second one of said channels, said system further including:
- third matrixing means for combining signals from each of said plurality of tone generators in a third phase relationship and applying its matrixed signals to a third one of said channels; and
- fourth matrixing means for combining signals from each of said plurality of tone generators in a third phase relationship and applying its matrixed signals to a third one of said channels.
- 8. A tremulant system for electrical musical instruments, comprising:
- a plurality of tone generators each capable of producing tone signals corresponding to at least some of the notes of a musical scale;
- phase displacement means including a plurality of operational amplifiers each having a first input and an output, at least some of said amplifiers also having a second input, one of said inputs being an inverting input and the other being a non-inverting input;
- a multiple channel chorus generating system, each channel having an input and an output, and each channel including a vibrato unit for continuously frequency modulating signals applied to the corresponding channel input;
- connecting means between the output of each of said operational amplifiers and the input of at least one of said channels of said multiple channel chorus generating system; and
- impedance means connecting each of said plurality of tone generators to a selected one of said first and second inputs of each of said operational amplifiers so that signals simultaneously produced in at least two of said tone generators are combined in different phase relationships for application to each of said channels, with the result that the wave beats that occur due to the simultaneous sounding of tone intervals produced from at least two different tone generators are applied through said operational amplifiers to said channels.
- 9. A tremulant system according to claim 8, wherein said vibrato unit is a variable bucket brigade delay line, and further including means for varying the vibrato unit in at least one of said channels.
- 10. A tremulant system according to claim 9, wherein said means for varying said vibrato units includes means producing a driving signal for each vibrato unit, said driving signals being phase displaced from one another.
- 11. A tremulant system according to claim 10, the system including four tone generators, four phase displacement operational amplifiers and four channels, the output of each of said operational amplifiers being connected to the input of a corresponding one of said channels, and wherein said driving signals are uniformly phase displaced from one another.
- 12. A tremulant system according to claim 10, the system including at least two tone generators, at least two phase displacement operational amplifiers, and four channels, the output of each of said operational amplifiers being connected to the inputs of at least two of said channels.
- 13. A tremulant system according to claim 10, the system including two tone generators, two phase displacement operational amplifiers, and three channels, the output of one of said operational amplifiers being connected to the input of two of said channels and the output of the other of said operational amplifiers being connected to the input of the remaining channel, and wherein said driving signals are phase displaced by 120.degree. from each other.
- 14. A tremulant system according to claim 13, further including a fourth channel having its input connected to the output of said other operational amplifier, the variable vibrato unit of said fourth channel being driven independently of said driving signals whereby the sound produced by said three channels has a multiple voice vibrato chorus effect and the sound produced by said fourth channel compensates for interval beats produced by said three channels.
- 15. A tremulant system according to claim 10, wherein each channel further includes an amplitude modulator, said system further including means for selectively driving said amplitude modulator.
- 16. A tremulant system for electrical musical instruments comprising:
- a plurality of tone generators each capable of producing at least some of the notes of a musical scale;
- n transmission channels each having an input and an output;
- a plurality of loudspeakers connected respectively to the outputs of said transmission channels;
- n vibrato units each connected between the input and output terminals of a respective one of said transmission channels;
- each vibrato unit having a control terminal;
- means for causing each of said vibrator units to modulate signals applied to its respective channel in response to a driving signal applied to its control terminal;
- n driving signals each of which is applied to a respective one of said control terminals, said driving signals having phase relationships that differ by approximately 360.degree./n;
- first matrixing means including a phase inverting input, a non-inverting input, and an output;
- means connecting the signals from each of said plurality of tone generators to one or the other of the inputs of said first matrixing means to combine said signals in one phase relationship;
- means connecting the combined signals appearing at said output of said first matrixing means to the input of at least one of said n channels;
- second matrixing means including a phase inverting input, a non-inverting input, and an output;
- means connecting the signals from each of said plurality of tone generators to one or the other of the inputs of said second matrixing means to combine said signals in a different phase relationship; and
- means connecting the combined signals appearing at said output of said second matrixing means to the input of at least a different one of said n channels.
RELATED APPLICATIONS
This application is a continuation in part of my application Ser. No. 406,411 filed Oct. 15, 1973, now U.S. Pat. No. 3,886,835 which was a continuation of my earlier application Ser. No. 44,276 filed June 8, 1970, now abandoned.
US Referenced Citations (11)
Continuations (1)
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44276 |
Jun 1970 |
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Continuation in Parts (1)
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406411 |
Oct 1973 |
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