knobs 5 for varying the parameters and characteristics of the input output signal further each input output channel 2a has a routing control switch 7 which is used for making selective interconnections between the input output channel 2a and any of a number of secondary channels 3 positioned on the right hand side of the mixer device the identification display panel 18 is used to namely mark each channel as an instrument or sound the volume of each channel module is controlled by the fader slide 6 additionally each channel module 2 corresponds to an output meter 4 located at the top of the mixer device 1 the output meter 4 indicates the level of audio sound for each channel module 2 the secondary channels 3 include ten controls arranged vertically in five stereo pairs with the upper right hand region occupied by five meter bridges 8 used to indicate the status of each corresponding secondary channel 3 the secondary channels 3 have channel routing control switches indicated by push buttons 9 and are grouped in pairs with a single control switch 10 determining connections of the two channels of a pair to selected input channels each secondary channel pair has a pan.