The music/song mutes when the mic priority setting is ON. To turn this off, click on the small “mic priority” button located above the mic echo volume knob. Once clicked, the LCD screen will display "On” or “Off" indicating the mic priority is turned off. If this does not resolve the issue, try powering off both the machine and mic and then powering it on again. If the issue still persists, please contact the support team for further assistance.