When playing a Multiplex disc (with vocals in one channel) in a 105G, 203G, or 305G player, press the MPX button on the remote control or the VOCAL button on the front panel of the player (for 203G or 305G) to cancel the vocals out.Â Pressing the button willÂ change the audio output fromÂ Stereo to Right or Left, thus eliminating the channel with the vocals.