Doofers and Splitters bundle complex effect chains within a single device and provide easy access to the most useful parameters through macros. A Splitter also has the ability to split the audio into two sub-signals, each with their own effect chain.
Equalization, or EQ, is about adjusting frequency balance within an audio signal. To this end, Renoise provides three such tools to aid in your quest for mixing magic.
Thanks for new tutorial. Would be great to have video on making selections with keyboard - how to for example how to select only FX column values with keyboard to interpolate them etc.