| 摘要 |
PURPOSE:To provide voice outputs having presence by synthesizing a common echo component by a single delay circuit with respect to plural microphone inputs. CONSTITUTION:In the case changeover switches 16, 17 are connected to A sides, the fundamental voice output of a microphone amplifier 3 is synthesized with a common echo voice output and the Lch voice signal of a voice reproducing device 8 by an adding circuit 9. Similarly, the fundamental voice output of a microphone amplifier 4 is synthesized with the common voice output and the Rch voice signal of the voice reproducing device 8 by an adding circuit 10. These Lch and Rch synthesized voices are outputted to an Lch speaker 14 and an Rch speaker 15 by power amplifiers 12, 13. In this case, since vocals do not become a monaural in a duetto playing, a duetto playing having presence is provided. |
