Hardware synthesizers usually don’t come with an AD converter, be it analog or digital making recording quite a peculiar process. Your first problem lies in that you need to get the signal into your DAW, and that would be through your soundcard.
Here are two ways you can send a signal into your DAW using your soundcard so that you can go on with your recording.
First is a quite complicated method, here is how it is done. You need to send the signal into a bass or guitar amp before recording by placing a mic maybe more than one in front of the amp.