I have a control use with 2 vestax spin djay software now installed the software djay 2 and I can not listen to the master in hedphone being that for = master and headphone out 1 2 3 4, when I want to listen to the output of the master and phone together can not .
Sorry, I’m not quite sure if I understand you correctly.
Generally speaking, you can change the Audio Devices Setup in the Settings. Simply tap the gear icon. You can also enable “Cue/Mix slider” under “Advanced”. If you put the slider somewhere in the middle (towards MIX), then you will also be able to hear the main mix in the headphones.