| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a phase switching device in an electric musical instrument, by which an acoustic wave outputted from the electric musical instrument is output in a positive phase. <P>SOLUTION: The phase switching device includes: a detecting means 2 for detecting whether the acoustic wave transmitted from the electric musical instrument 1 is a positive phase or anti-phase; and a phase inversion means 3 for inverting the phase of the acoustic wave transmitted from the electric musical instrument 1 to a positive phase. Further, the device includes, between the detecting means 2 and the phase inversion means 3, an inversion operation driving means 29 for causing the phase inversion means 3 to perform the inversion operation based on the detection signal when the result detected by the detection means 2 is the anti-phase. <P>COPYRIGHT: (C)2009,JPO&INPIT |
