It’s probably due to the buffer size on the streaming laptop. Try increasing the buffer size greater than 600 in the asio panel.
If you are a 4 deck virtual dj then it would be best to stick with your original method. If you only need at the most 3 decks then you can use both laptops via the mixer.
To use the mixer for both laptops requires you to give up ch 1. Use usb1 for obs laptop and usb2 for the VDJ laptop.
I’m running Resolume for background graphics, webcam and chromakey, feeding into VDJ via Spout. In VDJ I play audio and sometimes video, then add graphics and text overlays via the sampler, pad scripts and video skins, whilst broadcasting directly to Twitch. All on one laptop (Alienware M15 R6).
Does it have a fan? If not I wouldn’t use it for both.
Did you find the asio panel for your sound card on the windows machine yet? I’m still thinking that it a buffer issue.
It’s best to use 2 computers and if you only want to use one get an ATEM mini pro. It’s what I use now.
I’m trying to figure out why everybody is using extra external interfaces for obs. My audio and video was going into OBS wirelessly with another camera attached to the laptop.