The mixer can control the size of the music played on the computer player, but it cannot control what songs are played.
If you want the mixer to control the volume of music on your computer player, then you need to prepare a few things. First: A pair of 3.5-turn lotus lines. Second: Two Lotus to 6.5 adapters.
Connection method
1: Insert the 3.5 plug into the computer’s output port, which is the computer’s headphone port.
2: The two Lotuses are plugged into any two sockets of the mixer through the Lotus to 6.5 adapter.
Then the mixer can control the size of the music played by the computer player.
Thanks to the brother downstairs for adding that it is true that the digital mixer can play music.