Mixers

Sure, your DAW software has a virtual mixer, but software doesn't compare to actual knobs and faders, nor does it offer the flexibility of having physical EQs, inputs and pre-amps. Some mixers are control surfaces that can control your software, giving you the best of both worlds. Mixers are also great if your interface doesn't have enough physical inputs. For applications such as recording drums you can mix down several signals to one stereo signal. And of course mixers are essential for live applications.