You can adjust each knob to the middle before using• AUX: Adjusts the input accompaniment sound• LOW/MID/HI: Adjust the high and low parts of the vocal input from the microphone•INST: Adjusts the volume of the instrument input from the 'INST' jack• PITCH: Interesting voice change adjustments• MONITOR: Adjust the volume of your monitor through headphones•OUTPUT: Adjust the volume of the output to your phone/computer•MIC①②: Adjust the volume of the microphone input• PAD VOL: Adjusts the volume of the custom effect created by your input• DEPTH: Adjusts the depth of the reverb• DECAY TIME: Adjust the reverb time