Use the splitter's X/Y pad to see the diffrence between no sidechaining and tonnes of sidechaining.

TUTORIAL:

Get drums

Get synth or something

Get compressor

Get splitter

Get a merger of some sort

Run synth through the normal compressor and out to the merger

Run the drums through a splitter, then route them to the "Sidechain In" in the compressor and out to the merger.

Make sure the merger is hooked up to the output.

Congradulations! You just learned to sidechain! Go ahead, faint, you earned it.