| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To connect a sound collecting part to a tuning unit by wireless by miniaturizing the sound collecting part, reducing weight and power consumption thereof, and thereby achieving direct mounting of the sound collecting part on a musical instrument. <P>SOLUTION: A musical sound information transmitter is provided with the sound collecting part for converting a musical sound signal into an electric signal, a zero-crossing point detecting means for detecting a zero-crossing point of the electric signal output from this sound collecting part, and a transmitter for transmitting the timing information expressing the zero-crossing point detected by this zero-crossing point detecting means by carrying the information on a carrier, and the musical sound information receiver is provided with a demodulator which receives the carrier including the timing information expressing the zero-crossing point of the musical sound and outputs a square wave having rising and falling at the zero-crossing point of the musical sound. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
