AKJ7042 – Karaoke Mixer with Digital Key Control & Echo. AKJ7042 is a karaoke mixer with digital key control and echo. The AKJ7042 digital key & echo karaoke mixer contains three microphone inputs and four music source inputs. Up to three microphone inputs can be mixed with one of the four music sources. There is a master volume control knob to control the mixed audio volume. There are two microphone volume control knobs, where one control knob is used to adjust the volume of the Mic 3 input and the other is used to adjust the volume of the Mic 1 and Mic 2 inputs. The AKJ7042 digital key & echo karaoke mixer further contains the echo control function, the key control function, and voice canceling function. The echo control function enables the users to control or adjust the echo volume, the echo delay, and/or the echo repeat. The key control function allows the users to adjust the key up to +6 or -6 steps. The voice canceling feature is controlled by the Magic Vocal, R/L Select, and the Vocal Aid buttons. The vocal cancelling feature can be used to remove the multiplexed vocal portion of a song or to have the multiplexed vocal portion of the song to be removed only when the microphone inputs are present. As can be seen from the AKJ7042 rear panel, there are three video inputs. Each video input is selected through the corresponding audio input. There are two pre-amp. Outputs and three video outputs. The AKJ7042 digital key & echo karaoke mixer has been engineered for high quality sound with a wide dynamic range, low noise level. This is achieved with great attention to various product development stages, from the early product planning stage, through the high quality circuit design stage, to the final production stage with strict component selection. All of these make the AKJ7042 digital key & echo karaoke mixer an enjoyable karaoke entertainment vehicle for all the users. Features Configured To Be User Friendly. Key Control Steps:+/-6. Digital Key Control Display: Yes. Digital Echo Control: Volume/Repeat/Delay. Individual Microphone Volume Controls: Two. Master Music Volume Control: Yes. Magic Vocal, R/L Select, and Vocal Aid. Two Pre-out Audio Outputs and Two Video Outputs. Four Audio Inputs and Four Video Inputs. 25 – 80,000 Hz. 8 to 16 Ohms. Dimensions (W X H X D). 420 X 130 X 398mm (16.5″ X 5.1″ X 15.7). 8.0 Kg (17.6 lb).