In this tutorial I'll share some techniques I use to warm up an analog sound. We'll use the Subtractor patch from a previous how-to, and explore how we can beef it up and give it that "vintage" analog sound.

Boost the low end. 
It may seem obvious, but the first thing we can do is boost the low end a bit using an MClass EQ. To add it to the Subtractor, right click on the sub and choose Create -> MClass EQ.  We’ll set Param 1 Frequency to around 275 and the gain between 5 and 8 db. We don’t want to change the character of the sound, just give it a little more punch.

Analog Drift
NOTE: This tip probably makes more sense for polyphonic keyboard sounds, not monophonic sounds, like we have, but it does introduce using the CV connections in Reason, so I'll go through it anyway. It is one factor that made old analog synths sound that way.