The projector has integrated speakers.
However, you can also connect your stereo system etc. via the audio output.
We always connect the laptop via HDMI and pair our Bluetooth box with it.

The projector has a regular 3.5mm jack output. You can connect various speakers to this. We are at your disposal for product advice: Galaxus Help Centre

I only need the projector for presentations without audio. Unfortunately, I can't help you any further

Hello
I'm sorry but I don't use audio.

I only use it for poetry evenings and therefore only images to decorate.
There is an HDMI socket to send the image and from your computer the usual audio sockets I imagine.