Getting that Pumping Sound: Your Guide to Sidechain Compression in FL Studio

To set up sidechain compression in FL Studio, you'll need to route your audio signals through the mixer, assign a 'sender' track to a compressor on a 'receiver' track, and then enable the sidechain input on the compressor.

understanding sidechain compression: why bother?

sidechain compression is one of those production techniques that sounds complex, but once you get your head around it, it becomes an indispensable tool in your FL Studio workflow. at its core, sidechain compression simply means that a compressor on one track is triggered by the audio signal from *another* track. instead of the compressor reacting to the loudness of its *own* track, it listens to a different sound source to decide when and how much to reduce the volume.

so, why would you want to do this? the most common reason, and probably the one you've heard countless times in electronic music, is to create that characteristic "pumping" or "ducking" effect. imagine a fat bassline that gets slightly quieter every time the kick drum hits. this clears space for the kick, making it punch through the mix much more clearly without needing to be excessively loud. it's not just about volume, it's about creating rhythmic movement and clarity.

beyond the classic kick-bass ducking, sidechain compression has loads of other uses too. you might use it to:

• **make vocals sit better:** gently ducking the instrumental track whenever the lead vocal comes in, ensuring the words are always intelligible.
• **add movement to pads:** sidechaining a sustained pad sound to a shaker or hi-hat can give it a subtle rhythmic pulse, even if the pad itself isn't playing a rhythmic part.
• **clean up busy mixes:** in tracks with lots of elements, sidechaining can help carve out space for important sounds, preventing them from clashing and making the overall mix sound muddy.
• **creative effects:** sometimes, producers use exaggerated sidechaining for a stylistic effect, making entire sections of a track pump dramatically.

it's a powerful tool for achieving a professional, polished sound, and it's well worth learning properly.

setting up your mixer: the foundation

before you even think about compressors, you need to get your audio signals organised in the FL Studio mixer. this is the absolute first step for any kind of sidechaining. think of your mixer as the central hub where all your sounds come together, and where you'll tell them how to interact.

first things first, make sure all the elements you want to sidechain are routed to individual mixer tracks. for example, if you're sidechaining your bass to your kick drum, your kick needs its own mixer track, and your bass needs its own separate mixer track. this might sound obvious, but it's crucial.

here's a quick refresher on how to route sounds to the mixer:

• **instruments and samples:** go to the channel rack. for each instrument or sample, look at the number in the top right corner of its channel settings. this number corresponds to a mixer track. if it says "none", click and drag up or down to assign it to an empty mixer track.
• **audio clips:** drag your audio clip onto the playlist. then, in the channel rack, make sure the audio clip channel is also assigned to a mixer track.

once your sounds are routed, it's a good idea to name your mixer tracks. this makes everything much clearer, especially when you start sending signals around. right-click on a mixer track and select "rename, colour, and icon" to give it a sensible name like "kick" or "bass".

now, identify your 'sender' and your 'receiver'. the 'sender' is the sound that will *trigger* the compression, like your kick drum. the 'receiver' is the sound that will *be compressed*, like your bassline. in our kick-bass example, the kick track will be the sender, and the bass track will be the receiver. you'll be putting the compressor on the *receiver* track.

make sure both your sender and receiver tracks are routed to the master track, or to a bus that eventually leads to the master. you don't want to mute them or send them off into the void. the main idea here is to get everything neatly arranged so you can clearly see what's going where before we introduce any effects. this tidy approach will save you a lot of head scratching later on.

the classic method: using fruity limiter for sidechaining

this is the go-to method for many producers in FL Studio, and it's built right into the software. fruity limiter is an incredibly versatile plugin that functions as a compressor, limiter, and gate, and it handles sidechaining beautifully.

here's a step-by-step guide to setting it up:

1. **identify your sender and receiver:** let's stick with our kick (sender) and bass (receiver) example. make sure your kick is on, say, mixer track 1 and your bass is on mixer track 2. 2. **insert fruity limiter on the receiver track:** go to your bass mixer track (mixer track 2). in an empty effect slot, add "fruity limiter". 3. **route the sender to the receiver's sidechain input:** this is the crucial step. go to your kick mixer track (mixer track 1). at the bottom of the mixer, you'll see a send knob pointing towards the master track. below that, you'll see a series of small arrows pointing to other mixer tracks. find the arrow for your bass track (mixer track 2). right-click on that arrow. from the menu that appears, select "sidechain to this track". you'll see a thin green line appear, indicating the routing. importantly, make sure the volume knob next to this sidechain send is turned all the way down. you don't want to hear the kick on the bass track, you only want its *signal* to trigger the compressor. 4. **configure fruity limiter for sidechain:** - open the fruity limiter plugin on your bass track. - at the top of the plugin, you'll see three main modes: "limiter", "compressor", and "gate". click on "compressor" mode. - look for the "sidechain" dropdown menu, usually near the top right of the compressor section. click it and select "1: kick" (or whatever mixer track number and name your kick is on). this tells fruity limiter to listen to the kick drum's signal for its compression decisions. - now, adjust the compressor settings: - **threshold:** this sets the level at which the compressor starts working. lower this to make the compressor react more. - **ratio:** determines how much the signal is compressed once it crosses the threshold. higher ratios mean more aggressive ducking. start with something like 3:1 or 4:1. - **attack:** how quickly the compressor reacts after the kick hits. a very fast attack will duck the bass almost instantly, which can be good for punch. a slightly slower attack might let the initial transient of the bass through before ducking. - **release:** how quickly the compressor stops compressing after the kick's signal drops below the threshold. this is key for the "pumping" feel. a shorter release creates a faster pump, while a longer release will hold the ducking for longer, creating a smoother swell. experiment with this to find the sweet spot for your track's tempo. - **gain:** this is the makeup gain. as the bass is being compressed, its overall volume will drop. you can use the gain knob to bring its volume back up to compensate, if needed.

play your track and tweak these parameters. you should start to hear your bass ducking every time the kick drum hits. it takes a bit of practice to get the attack and release just right for a natural, musical pump.

alternative approaches: patcher and third-party plugins

while fruity limiter is excellent, FL Studio offers other ways to set up sidechain compression, and there's a whole world of third-party plugins that can make the process even quicker or offer different sonic flavours.

patcher for advanced routing

FL Studio's patcher is an incredibly powerful environment for building complex effects chains and routing setups. for sidechaining, it can be useful if you're dealing with multiple sidechain inputs or want to combine various effects with your compressor.

to use patcher for sidechaining:

• insert patcher onto your receiver track (e.g., your bass track).
• inside patcher, add a fruity limiter (or any other compressor).
• drag the "from fl studio" input to the sidechain input of your compressor.
• then, back in the main mixer, right-click the send arrow from your sender track (e.g., kick) to the receiver track (bass) and choose "sidechain to this track". this signal will now feed into the "from fl studio" input within patcher, which you can then route to the sidechain input of your chosen compressor.

this method offers more visual control over your signal flow and can be really handy for intricate setups, though it might be overkill for a simple kick-bass sidechain.

third-party sidechain compressors

many developers have created plugins specifically designed for easy sidechaining, or general compressors with excellent sidechain capabilities. these often simplify the routing process significantly.

some popular options include:

• **kickstart (nicky romero):** this is a super simple plugin that essentially automates a volume ducking envelope. you place it on your receiver track, and it automatically ducks the volume in time with your project's tempo or a MIDI trigger. no complex routing needed, making it incredibly fast for quick results.
• **shaperbox (cableguys):** shaperbox is a multi-effect plugin with a powerful volume shaper module. you can draw in your own sidechain curves, giving you precise control over the ducking shape. it can also be triggered by an external sidechain signal, similar to fruity limiter, or by MIDI.
• **pro-c 2 (fabfilter):** this is a professional-grade compressor with excellent sidechain functionality. it offers incredible visual feedback and extremely precise control over all compression parameters, including a dedicated external sidechain input.

the setup for these third-party plugins usually involves placing the plugin on your receiver track and then either:

• **internal triggering:** some plugins (like kickstart) don't need external routing, they just duck based on tempo.
• **external sidechain input:** for others (like pro-c 2), you'll still do the same mixer routing as with fruity limiter: right-click the send arrow from your sender track to your receiver track and select "sidechain to this track". then, within the plugin itself, you'll typically find a button or menu to activate the "external sidechain" or "sidechain input".

the main benefit of these alternatives is often ease of use, different sonic characteristics, or advanced visual feedback that can help you dial in the perfect sidechain effect.

refining your sidechain: tips for a polished sound

getting the basic sidechain working is one thing, but making it sound polished and musical takes a bit of tweaking. it's all about finding that sweet spot where the ducking feels natural and enhances the groove, rather than sounding artificial or distracting.