Xfer Serum was released in September 2014 by the one and only Steve Duda (who people often associate with deadmau5 because of many different reasons). SerumFX is an effect plugin that you get separate from the main Serum synth when buying it. This is an often overlooked plugin that I highly recommend you take a look at. All of the effects from Serum are made available to use any sound on any channel that you’re using in your DAW. Using SerumFX as an effect.