Once your all linked make a pattern in the Fruity Kick channel maybe a 4 to the floor kick pattern or whatever you prefer. Then for the mapping formula I like to set it to 'Inverted' pick one that suits you best or make your own. In this window set the 'Internal controller' to 'Peak Ctrl (SIDECHAIN). So right click the volume knob and click on 'Link to Controller.' A new window should now pop up with some settings. I like to link it to the volume knob (which is pretty common amongst Trance music and the likes). Linking it to something is pretty simple.

Mess with the controls after it is linked to something for now leave it as default. It is auto set to MUTE so if you want the synthe or sample to still make sound unmute it (bottom right corner of the controller). Now that you have it linked to a mixer channel in the 8th slot (it really doesn't matter which slot) put a 'Fruity Peak Controller'. Give it a mixer slot and name it SIDECHAIN. Anyways add a fruity kick or whatever you would like to affect your synthe to a new channel.

So how do you set it up? Well really you can use anything, I commonly find myself using a Fruity Kick because I've never really used it for anything else. The easiest way to do it and the way I do it is through the Fruity Peak Controller which can be found in the FX for your Mixer channel. Sure you could automate it but thats just a pain all around. In FL Studios it's not so apparent on how you can get that effect. Play around with it and you'll soon see what you can do with it. You can place it on a pad or even a bass to get that sound your looking for. It can be used in tons of situations and multiple genres. Side chaining can get you a nice pumping sound from your synthe and give you a good club feel. Once I learned though I instantly added it to my style. Ok well I'll admit I didn't learn side chaining till later on in my life.

The link to the video can be found below. General Overview: Learn how to stylize your synthes by adding some side chaining to get interesting affects.

Sidechain with fruity peak controller