Musical apparatus detecting maximum values and/or peak values of reflected light beams to control musical functions2010-03-08 00:00:00/>receiving radiation reflected from an object within the specified space along at least two light paths;
generating information based on a characteristic of radiation received from each of the at least two light paths;
receiving performance data from a performance signal source;
generating an audio signal based on the performance data; and
controlling a characteristic of the audio signal based on the generated information.
10. A method as recited in claim 9, wherein receiving radiation reflected from an object comprises receiving light reflected from an object.
11. The method recited in claimed 9, wherein receiving performance data from a performance signal source comprises receiving performance data from a digital music signal source.
12. The method recited in claim 9, wherein receiving performance data from a performance signal source comprises receiving performance data from a Musical Instrument Digital Interface ("MIDI") signal.
13. The method recited in claim 9, wherein generating information based on a characteristic of radiation received from each of the at least two paths comprises:
generating at least two detection values, each of which is based on a characteristic of radiation received from each of the at least two paths;
detecting a maximum value of each of the at least two detection values; and
controlling a characteristic of the audio signal based on a correlation between the maximum values of the at least two detection values.
14. The method recited in claim 9, wherein the audio signal is a tone signal.
15. The method recited in claim 9, wherein generating information based on a characteristic of the radiation received from each of the at least two paths comprises generating information based on a quantity of radiation received from each of the at least two paths.
16. The method recited in claim 13, wherein generating at least two detection values, each of which is based on a characteristic of radiation received from each of the at least two paths comprises generating at least two detection values, each of which is based on a quantity of light received from each of the at least two light paths.
17. A method of controlling and outputting music based on the motion of an object within a specified space, the method comprising:
receiving radiation reflected from an object within the specified space,
controlling a characteristic of the received radiation by moving the object within the specified space;
generating a detection value based on the characteristic of the received radiation;
receiving performance data from a performance signal source;
generating an audio signal based on the performance data,
outputting the audio signal; and
controlling the audio signal based on the detection value.
18. A method as recited in claim 17, further comprising emitting radiation into the specified space.
19. A method as recited in claim 18, wherein emitting radiation comprises emitting light and wherein receiving radiation comprises receiving reflected light.
20. A method as recited in claim 17, wherein receiving radiation comprises receiving light reflected from the object within the specified space.
21. A method as recited in claim 17, wherein receiving radiation comprises receiving light reflected along at least two paths from the object and wherein generating a detection value comprises generating a value dependent upon a characteristic of light received ...
Generation of noise-like tones in an electronic musical instrument2010-02-27 00:00:00is:
1. An electronic tone synthesizer for
generating an audio signal having a predetermined waveform in which noise is superimposed on the audio signal, comprising: a group ofdigital words representing the relative amplitudes of equally spaced points defining the waveform of an audio signal, a digital-to-analog converter, means transferring the digital words sequentially from the generating means and applying the words inrepetitive sequence to the converter, the transferring means including means for modifying the digital value of any selected word as it is being transferred, a random signal generator for
generating an output signal at random time intervals, and meansresponsive to the random output signal for momentarily activating said means for modifying a word being transferred, whereby the digital words are modified at random during transfer.
2. Apparatus of claim 1 wherein said means for modifying said digital values includes a right shift circuit for shifting the digital values of the randomly selected words numerically at least one place to the right.
3. Apparatus of claim 1 wherein said means for modifying said digital values includes a 2's complement circuit for generating the 2's complement of the digital values of the randomly selected words.
4. Apparatus of claim 1 wherein said means for modifying said digital values includes means for delaying the time of transfer at which a selected word is transferred from the generating means.
5. Apparatus of claim 2 wherein the transferring means further includes a shift register, a right shift circuit for transferring each of the digital words in sequence from the generating means to the shift register, clock means for generatingclock signals at a rate proportional to the pitch frequency of the tone being generated, said transferring means being activated by said clock signals.
6. Apparatus of claim 3 wherein the transferring means includes a shift register, a 2's complement circuit for transferring each of the digital words from the generating means to the shift register, clock means for generating clock signals at arate proportional to the pitch frequency of the tone being generated, said transf...
