How do I listen to the line in and front mic port at the same time?

Hello, I've been working on this problem for a couple of days now and I don't know what else to try. I'm trying to listen to the line in and front mic port at the same time. I'm able to get this working on Windows without a problem so I know my hardware is capable of doing this task. I just don't know how to get it to work on Linux. I'm able to listen to one or other perfectly fine just not both at the same time. I tried changing the audio card to pro audio and linking to my headset and that just caused static. I tried making a source manually to have a different port, but I couldn't get that to work. I also tried messing around with hdajackretask too.