One way to add a bit realism to your mix is to use:
- gain plugin (e.g. Free G from sonalksis)
- distortion plugin (e.g. camelcrush from camel audio)
=> A common way to simulate the analog style warmth is to use gain/distortion and tube emulation. Used carefully and sparingly it can make your mix sounds a lot better!
To give your entire mix a “vintage style” flavor, add a gain and/ or distortion plugin to your master channel. (Many producers use “PSP Vintage Warmer” for this job.)