| 摘要 |
PCT No. PCT/JP80/00328 Sec. 371 Date Aug. 24, 1981 Sec. 102(e) Date Aug. 24, 1981 PCT Filed Dec. 25, 1980 PCT Pub. No. WO81/01922 PCT Pub. Date Jul. 9, 1981.A tone control circuit which has a first signal path which passes an input signal directly and a second signal path which includes at least a filter and a gain control circuit and an adder receiving the first signal and the second signal and control means for providing a control voltage to the gain control circuit and switching means for controlling the gain control circuit to selectively control the output of the adder to produce an output signal with the desired selected frequency response. |
