Welcome back. In this intermediate Ableton Live lesson we’re doing something that instantly makes drum and bass sound more “finished”: sidechain amount automation by section.

Because in DnB, sidechain is not just a mix trick. It’s arrangement glue. The amount of ducking that feels perfect in a tight, rolling drop can feel totally wrong in a breakdown, a half-time switch, or a build where you’re trying to create tension. So today the goal is simple: one solid sidechain setup, and then we automate the amount so every section has the right kick-versus-bass relationship.

By the end, you’ll be able to keep the low end clean and loud in the drop, relax the pumping when things get atmospheric, and do those little “pre-drop inhale” moves that make transitions hit harder without just turning things up.

Let’s start with a quick prep that makes everything else easy.

Step zero: set up routing so automation stays clean.

First, identify your kick track. Ideally it’s the clean, consistent kick that drives the groove in the drop.

Now, here’s the big workflow upgrade: create a ghost kick for sidechain. Duplicate the kick track, rename it “SC - Ghost Kick,” and make sure it’s a short, consistent clicky kick. You can use the same sample, but the point is consistency.

Then turn off its audible output. In Ableton you can set Audio To to “Sends Only,” or route it so you can still select it as a sidechain source but you don’t actually hear it in the mix.

Why do this? Because your audible kick often changes over the arrangement. You layer it, you add fills, you swap samples, you do little variations. If the sidechain trigger changes with those decisions, the bass pumping starts to feel random. A ghost kick keeps the sidechain “brain” stable, even if the kick sound evolves.

Cool. Now we build the core sidechain on the sub.

Step one: sidechain the sub with Ableton’s stock Compressor.

Go to your Sub track. Add Compressor. Open the sidechain section, and for Audio From choose “SC - Ghost Kick.”

Now a few key choices for DnB:
Set the compressor to Peak mode if you want tight, immediate pumping. Turn on a little Lookahead, around 1 millisecond, just to help it grab the transient cleanly.

Starting settings that usually land well:
Ratio somewhere between 4 to 1 and 10 to 1. Higher ratio clamps harder.
Attack very fast, like 0.1 to 1 millisecond.
Release usually 60 to 140 milliseconds at 174 BPM, but we’ll fine-tune it by feel.
Then lower the threshold until you see around 3 to 6 dB of gain reduction in a drop.

Quick coaching note: don’t worship the gain reduction number. Use it as a sanity check. The real question is: does the kick read as the most obvious transient in the low end, without the bass feeling like it vanishes every hit? Loop the drop and listen for that. The meter helps, but your groove decides.

Optional but useful: if your Ableton version has the sidechain EQ in the compressor, use it to focus detection more on the kick’s punch than the sub tail. In practice that means you’re telling the compressor “react to the transient,” not “overreact to long low-end energy.”

Now we get to the main topic: automating sidechain amount by section.

Step two: create one “Sidechain Amount” control that’s easy to automate.

Yes, you can automate the compressor threshold directly. That works. But the cleanest workflow, especially in bigger projects, is to wrap the compressor in an Audio Effect Rack and map the threshold to a macro.

So, select the compressor on your sub, press Command or Control G to group it into an Audio Effect Rack. Show the Macros. Click Map. Click the compressor threshold. Click Macro 1.

Rename Macro 1 to something obvious, like “SC Amount - Sub.”

Now set a musical range. The idea is: your macro should sweep from lighter ducking to heavier ducking without you accidentally going extreme.
A common starting range might be something like minus 30 dB on the heavy side and minus 12 dB on the light side, but these numbers depend on your levels. What matters is the concept: you’re building a safe fader for “how hard do I duck,” and you can automate it per section.

Extra teacher tip: calibrate once in the loudest section first. Usually Drop 1. Get the compressor behaving correctly there. Then when you automate the rest of the arrangement, you’re mostly backing off for thinner sections and leaning in when the mix gets crowded. That’s faster, and it avoids endless tweaking.

Step three: copy the system to mids and atmos, but change the timing.

DnB almost never wants the exact same attack and release on sub, reese mids, pads, and FX. You’ll get a mix that technically ducks, but musically it won’t feel right.

For your mid bass, like a reese or growl:
Set up another sidechained compressor from the same ghost kick.
Try an attack a little slower, like 1 to 5 milliseconds, so the mid character keeps some bite.
Release might be 80 to 180 milliseconds depending on the rhythm.
Then rack it and map threshold to a macro called “SC Amount - Mids.”

For pads, atmos, and FX returns:
You usually want subtle movement, not obvious pumping.
Use a lower ratio, like 2 to 1 up to 4 to 1.
Attack more natural, 5 to 15 milliseconds.
Release longer, maybe 150 to 350 milliseconds.
And in the drop you might only want 1 to 3 dB of reduction.

One more practical move: if pads and FX still feel cloudy after sidechain, add an Auto Filter or EQ Eight after the compressor to trim mud. Sidechain creates time-based space, filtering creates frequency-based space. Together they feel way cleaner.

Now we automate by section.

Step four: automate sidechain amount in Arrangement View.

Go to Arrangement. Press A to show automation.

Find your macro lane. For example, on the sub track: Rack, then “SC Amount - Sub.”

Now we write automation like an arranger, not like a technician. Think in sections, and mostly use stable plateaus rather than wiggly lines.

A typical DnB structure might look like this:

In the intro, light ducking. Set the macro near the light end so the bass feels present.

In the breakdown, minimal ducking. If the kick is barely there or the drums are sparse, heavy pumping just makes atmos “breathe” awkwardly. Keep it almost off, or just a touch if the kick is still playing.

In the build, ramp the amount up. This is one of the easiest ways to create tension without changing volume. Over the last 8 bars, or even just the last 2 bars, increase ducking so the mix feels like it’s getting tighter and more controlled.

In the drop, lock a strong, consistent amount. This is where you want that 4 to 7 dB on the sub as a rough reference, but again: calibrate to the feel. The kick should punch, the bass should feel confident, not nervous.

Then for Drop 2, don’t assume it should be identical. If your kick pattern is busier, you may need a different release so the bass returns in the pocket. If you do a switch-up or half-time, revisit both amount and release. The groove changed, so the recovery time might need to change too.

And here’s a big one: treat fills as their own micro-section. If you have a bar with triplet kicks, doubles, or a missing kick, the bass can suddenly lurch because the sidechain is reacting to a different trigger pattern. Make a one-bar automation tweak. Slightly reduce the amount, or shorten the release, just for that fill bar. Then return to your main plateau.

Also, use automation shapes for ramps. Smooth transitions often sound more intentional than hard steps, especially going into the drop.

Step five: speed up your workflow with locators.

Add locators at each section start: Intro, Break, Build, Drop 1, Switch, Drop 2. Name them clearly, even with hints like “Drop 1 Tight” or “Drop 2 Wide.”

Then loop each section and dial your macro until it feels right. The principle is: match sidechain depth to musical density. Crowded section equals more controlled ducking. Airy section equals less.

Now a more advanced option if you want bigger-project scalability.

Step six: global control versus per-track control.

If you group your bass tracks into a Bass Bus, you might be tempted to sidechain only the bus. Sometimes that works, but often the sub and mids need different timing, so you lose finesse.

A better approach is: keep per-track sidechain for sub and mids, then optionally add a gentle bus compressor for “glue.” On the bus, keep it light: ratio 2 to 1 up to 4 to 1, attack 3 to 10 milliseconds, release 100 to 200, and only 1 to 3 dB of reduction in drops.

That gives you individual control plus a subtle overall movement.

Optional alternative for special moments.

Step seven: hard-cut sidechain using Gate.

If you want a choppy, jungle-ish, very tight neuro feel, use Gate instead of Compressor on a bass layer. Turn on sidechain, feed it the ghost kick, and set threshold so the kick reliably triggers. Adjust hold and return so the bass closes on the kick and snaps back musically.

Then just like before, rack it and automate the threshold or your macro by section. This is aggressive, so use it for moments, not necessarily the whole track.

Let’s cover a few common mistakes so you can avoid the usual pain.

One: automating release when you meant to automate amount. Amount changes space. Release changes groove. Both matter, but be intentional.

Two: too much ducking in breakdowns. If the track is supposed to feel wide and emotional, heavy pumping can make it feel like it’s gasping.

Three: sidechaining only the bass bus. Sub and mids often want different behavior.

Four: kick changes but sidechain source doesn’t match, or vice versa. That’s why ghost kick is so powerful.

Five: gain staging. If your bass is louder in one section and quieter in another, the same threshold will create different gain reduction. That’s exactly why we automate by section. And if you want extra consistency, add a Utility before the compressor as a level trim, so the compressor sees a stable input.

Two more pro-level coaching ideas before we wrap.

First: pre-FX versus post-FX sidechain. If you sidechain before distortion, the distortion can “refill” the duck and feel denser. If you sidechain after distortion, the whole thing steps out of the way more cleanly. Choose on purpose per layer.

Second: if the low end is smearing, don’t only increase ducking. Often the fix is release timing. At 174 BPM, tiny release changes can decide whether the bass returns under the kick tail, which makes mud, or after it, which makes punch.

Now a quick practice exercise you can do right after this lesson.

Set a project to 174 BPM. Make a 24-bar arrangement: 8 bars break, 8 bars build, 8 bars drop. Put a kick pattern in, a rolling sub, and some reese mids.

On the sub, calibrate your compressor in the drop so it feels right. Then automate your “SC Amount - Sub” macro: light in the break, ramp in the build, steady in the drop.

On the mids, use less ducking than the sub. Maybe 2 to 4 dB in the drop, depending on the sound.

Export a quick bounce. Listen on small speakers or headphones and also at low volume. At low volume especially, the kick should still be obvious, and the bass should feel steady, not like it’s panicking.

Final recap.

In drum and bass, sidechain amount should be section-dependent. Use a ghost kick so your trigger is consistent. Put the compressor in an Audio Effect Rack, map threshold to a macro, and automate that macro by section. Keep the sub tighter and faster, keep mids and pads lighter and more natural, and write automation like an arranger: stable plateaus with intentional ramps at transitions.

If you tell me your style, liquid, jungle, neuro, or dancefloor, and whether your kick is short and punchy or long and heavy, I can suggest a concrete set of three section presets, like Airy, Controlled, and Aggressive, with attack, release, and macro ranges that fit your groove.