Patent ID: 7375275
Filing Date: 2008-05-20
Classification: G10H

Abstract:
1. An electronic instrument, comprising: input means for inputting an audio signal, the input means having a plurality of channels to each of which the audio signal is input; demodulation means for demodulating audio signals that have been input by the input means and converting the audio signals into digital signals that control the electronic instrument; feed means for feeding the digital signals that have been demodulated by the demodulation means to a sound source; detection means for detecting whether or not any of the audio signals of the plurality of channels that have been input by the input means are modulated by the digital signals that control the electronic instrument; and control means for controlling the demodulation means, in cases where it has been detected by the detection means that any of the audio signals of the plurality of channels that have been input by the input means are modulated by the digital signals that control the electronic instrument, so as to demodulate the digital signals that control the electronic instrument from the audio signals that have been input to the channels, such that a second channel's audio signals that are not modulated by the digital signals are output to an audio output; wherein the control means includes delay means for delaying a digital signal that has been demodulated by the demodulation means a specified period of time and fed to the sound source; and wherein the detection means differentiates a type of digital signal by detecting which of the audio signals of the plurality of channels that have been input by the input means are modulated by the digital signal, and in cases where the detection means has detected that any of the audio signals of the plurality of channels that have been input by the input means are modulated by the digital signal, the detection means differentiates a type of digital signal by detecting a width of a pulse that forms a waveform of the audio signal, and wherein the delay for a specified period of time and feed to the sound source is performed by the delay means 1) on the signal that has been detected by the detection means to have been modulated by the digital signals that control the electronic instrument at the time the signal was input by the input means to one of the plurality of channels, and 2) in conformance with the type of digital signal, which has been demodulated by the demodulation means, and that has been differentiated by the detection means.