| 摘要 |
PURPOSE:To attain the correction of a frequency characteristic and the tone quality adjustment excellent in operability without increasing the circuit scale by dividing an audio band into the N and M number of bands, and converting so as to execute a first operation input for the N number of bands and allocate a second operation input to the M number of bands and a gain increasing decreasing quantity. CONSTITUTION:An audio band is respectively divided into N and M(<N) numbers of bands, the second operation input for the M number of bands is converted and allocated respectively to the N number of bands as a gain increasing decreasing quantity and from these gain increasing decreasing quantities and the first operation input for the N number of bands, respective gains of the N number of bands are determined. Consequently, regardless of the width of the band to adjust a gain, the operability becomes easier, the gain is collectively determined and the variable resistance value of the electronic type variable resistor main body can be changed. Thus, without increasing the circuit scale, the problem of the antimony to occur due to the number of divisions of band can be cancelled. |
