How do I connect my amplifier to the mixer but then also via laptop (AUX) funkoniert?

I have a little problem i want my mixing console

(Resident dj Kemistry 3 WH mixer 4 canali DJ Bluetooth)
connect to my amplifier https://www.amazon.de/...0093J5CM0/

And that will then run on a laptop which is connected to the amplifier aux but it does not funkon have synonymous only 1 red cable with a black but it was once no longer can I help anyone?

If you think that you want to have an audio output with both your laptop and your amplifier, I recommend you a splitter. So you can then make two from one exit.

I had tried it shines though, but I can't change the music is just over amplifier…

Do you have the cable that goes into the laptop in the input (usually red) and not in the output (usually green)?

My laptop is indeed connected to the aux cable s.der amplifier a normal

Achso, if you think that your laptop should also feed into the amplifier, then you must use the output and select the correct program for the respective audio output device.

Yes but I have to select nothing if the amplifier is already running anyway with the laptop only the mixer does not funkoniert.

If the faders, as well as inputs and outputs are correctly plugged in, one can assume only from a defect…