Comentário oficial
1) Play a song on the software for each deck.
2) Adjust the trim knob so the channel meter shows peaking around the first orange LED.
3) Press the CUE button above the CH1 fader.
4) Turn the HEADPHONE MIXING knob to the middle position.
5) Adjust the HEADPHONE VOLUME knob. You should now hear audio in the headphones from that channel.
6) Press the CH1 CUE button again to disable it.
7) Adjust the MASTER VOLUME knob to around the 2 o'clock position.
8) Take the CH1 fader to the top, and press the CUE button below the master volume level. you should now hear the same audio in the headphones.
9) Press the CUE button above the CH2 fader. You should now hear both the master audio and CH2 playing. If one is louder than the other, adjust using the headphone mixing knob.