There is 1 to sing karaoke. MIC part: the adjustment of high and medium bass, the adjustment of effect sound and the adjustment of volume. Adjustment of accompaniment music: adjustment of high school bass, adjustment of tone sandhi and adjustment of volume. Mic part adjustment: the high and medium bass knobs (generally) are at 12 (except for special voice), and the effect sound: the delay and repeat buttons (generally) are at 12 (except for special needs). Adjustment of accompaniment music: the knob of high school bass is 12 (except for special needs), and the adjustment of tone sandhi depends on the specific situation (if it is too high, it will be lowered, if it is too low, it will be raised). The final adjustment is the balance between the volume of mic and the volume of music (the volume of mic is 60-70%, and the volume of music is 40-30%), which are the most basic tuning methods.