How do i route these speakers on my computer for recording?

[Shreddy Mercury]

I have some old cheap Sampson or whatever powered monitors with a subwoofer. I just hook a 1/8 out of the headphones jack of the computer that splits into 2 rca jacks and plug that into my sub, then run rca jacks out of the sub into each monitor. It produces sound and works great, however...the static lol on white screens when I'm on YouTube or playing along to an online guitar tab, the static is rough when not in use.

I am going to just have to get an interface to record with cuz the one in the katana just isn't cooperating on latency. So here's my question: how do I set this up so that my computer still sends audio to the monitors for when I just wanna jam over a track or watch a video on youtube, but also still comes out of the interface for when I'm actually recording and noodling around with the recording software?

 

[stratjacket]

Have you tried the speaker out jack Instead of using the Headphone jack?
Without knowing what computer and audio it has, I assume it’s Windows and has something like the pic below, use the green out jack.

 

[midnightlaundry]

When U get the Interface, you'll need to select it in your recording program. It will also play videos from your browser, but you'll need to select channel 1-2 Interface(X) in Sound Settings on the computer side as well. Once set up, everything will sync automatically. You'll use the Interface as a Master Volume..

 

[Shreddy Mercury]

Ok cool, sounds easy enough. Thanks!