GRAPHIC EQUALIZER

PURPOSE:To prevent an oscillation caused by a malfunction by constituting a titled graphic equalizer so that a dubbing switch for sound-recording a reproducing signal of one running system of a tape recorder to the other running system by an operation of a sound recording output changeover switch is switched by a control signal. CONSTITUTION:At the time of sound recording, dubbing switches 2, 7, sound recording and reproducing changeover switches 3, 6, and switches 17, 19 are set to off, sound recording and on, respectively. In this case, a sound recording output changeover switch 24 becomes off by synchronizing with the dubbing switches 2, 7, and a signal path of an amplifier input terminal 10 the sound recording output changeover switch 24 ... a dubbing switch 8 the sound recording and reproducing change over switch 6 a sound recording device 5 of the second running system, and a signal path of the dubbing switch 7 the sound recording and reproducing changeover switch 3 ... a graphic equalizer body 21 an amplifier output 15, which has branched off from on the way of said signal path are formed. In this way, a sound recording monitor can be executed at the same time as sound recording of a signal applied to the amplifier input 10. Also, no loop is formed in the signal system and no oscillation occurs.