Hey — welcome. Today we’re doing a beginner-friendly Ableton lesson that will transform your low end: sidechain compression for a clean, powerful Drum & Bass sub and a kick that punches through. We’re working at 174 BPM, stock Ableton devices only, and by the end you’ll have a setup that ducks the bass where it needs to while keeping the bass character intact. Let’s go.

First, quick overview of the idea. In DnB the low end is busy: fast kicks, rolling basslines, heavy subs. If everything sits on the same frequencies you get mud and the kick disappears. Sidechain compression, or ducking, creates space for the kick by reducing bass level exactly when the kick hits. The trick is to make the compressor respond only to the kick’s low energy so snares and hats don’t trigger unwanted pumping.

Okay — project prep. Set the tempo to 174 BPM. Create three tracks: a Drum track that has your kick and break or amen chops, a Bass track with your instrument, and a Trigger track that will act as the sidechain source. Name that third track Kick-Trigger so you don’t forget it.

Now we’ll make a clean low-frequency sidechain trigger. Duplicate your kick sample onto the Kick-Trigger track. On that track insert an EQ Eight and switch it to a low-pass or use a low-pass band: set the cutoff around 120 Hz to start — you can go 80 to 150 depending on the kick. If the trigger is too weak, add a Utility and nudge gain up a few dB. Important: make the Kick-Trigger inaudible to the master but keep it selectable for sidechain. Either mute the track output or set Monitor = In and route it with no audible output. The aim here is that your compressor hears only low frequency energy from the kick, not snare clicks or hi-hats.

Next, build the Bass track device chain. Put your instrument first — Operator, Simpler, Sampler, whatever. Then an EQ Eight high-pass at 20 Hz to remove sub rumble, maybe a gentle cut around 200–400 Hz if needed. Optional Saturator with low drive for mid presence, then a Glue Compressor if you like. Then drop an instance of Ableton’s stock Compressor — this is the sidechain duck — and finally a Utility for final gain and width control. If you want the compressor’s duck to happen before glue, put it before the Glue Compressor.

Configure the Compressor for sidechain. Click the little sidechain triangle to open the sidechain section, set Audio From to Kick-Trigger, and pick Pre FX for a clean trigger signal. For a musical starting point set Ratio to 4:1, Threshold so you see about 3 to 6 dB of gain reduction on kick hits — this may be around minus 20 to minus 10 dB but trust your ears and the GR meter. Set Attack very fast but not zero — around 0.5 to 5 milliseconds so the kick transient can snap through. Set Release around 60 to 120 milliseconds so the bass recovers between hits; at 174 BPM 100 ms is a solid starting place. Use a soft knee, leave make-up off, and listen. If you want heavier ducking for drops, increase Ratio to 6–10:1, lower the Threshold for 6–12 dB of gain reduction, tighten Release to 40–90 ms, and nudge Attack to 1–2 ms for a more aggressive pump.

If you only want to duck the sub and leave the mid/high harmonics untouched, there are two recommended approaches. First, our filtered Kick-Trigger method already focuses the compressor on low energy while running on the whole bass. That’s easy and effective. Second, for surgical control, use an Audio Effect Rack split into two chains: Chain A is low band, EQ Eight low-pass to about 150 Hz, with the Compressor and sidechain on that chain only; Chain B is the mid/high band with a high-pass and no sidechain. Blend them so the low band ducks while mids stay steady — you keep character and clarity.

Before you finalize, check phase and mono. Solo kick and bass in mono — if the kick disappears when summed, you have phase cancellation. Flip phase on one source or nudged timing by a few milliseconds until it sounds solid in mono. After your processing, use a Utility to make sub frequencies mono: set Width to 0% below about 120 Hz, either with a dedicated low-mono chain or automation. This helps club systems and avoids L/R cancellation.

A few common mistakes and quick fixes. If the whole drum bus is triggering the compressor and you hear snare pumping, reassign the sidechain to the Kick-Trigger or filter more aggressively. If the kick transient is getting killed, your Attack is probably too fast — increase to 1–5 ms to let that punch through. If the bass never feels to recover or sounds constantly sucked out, the Release is too long — try 60–120 ms or move in small steps by ear. And don’t forget to mute the Kick-Trigger so it’s not audible in the mix.

Pro tips if you want a darker, heavier DnB approach. Use a ghost sub trigger: create a short sine tone at 40–60 Hz on a muted MIDI track and place it on every kick position. Route it to no output and use it as the sidechain source for consistent, reliable triggering without altering your audible kick. Multiband Dynamics can be faster than racks: insert Multiband Dynamics and only compress the low band with sidechain enabled. For tonal presence, saturate the mid-bass layer while keeping the pure sub cleaner — that way the sub gets ducked but the mid harmonics remain audible. Also consider parallel ducking: send a little bass to a return that’s heavily sidechained and distorted, then blend for an aggressive pump layered on top of the clean bass.

Now a short practice exercise you can do in 15 to 30 minutes. Set tempo to 174. Load a kick and an amen or break. Program a simple 1-bar kick pattern. Create a bass with a low sub note and a harmonic layer. Duplicate the kick to a Kick-Trigger track, low-pass at 120 Hz, mute it. Put Compressor on the Bass track, sidechain to Kick-Trigger Pre FX. Start with Ratio 4:1, Threshold for about 4 dB GR on kick hits, Attack 2 ms, Release 100 ms, Knee 6 dB. Play the loop and tweak Threshold and Release until the kick is clearly audible and the bass recovers between hits. Try switching Ratio to 8:1 and Release to 70 ms to hear the pump, then back off to find a musical balance. If you want to go further, build an Audio Effect Rack split and only sidechain the low chain — compare the results.

A couple of quick coach notes to close. When dialing in duck, watch both the gain reduction meter and the audible recovery of the bass. If you see little GR but hear a lot of pumping, your trigger is probably weak — boost it or use the ghost sub trick. Tiny saturation on mid frequencies often makes bass read louder on small speakers without adding competing sub energy. And always double-check routing — if snares still trigger the sidechain, you might be sending the wrong pre/post signal or accidentally routing the drum bus into the trigger.

Recap: use a filtered Kick-Trigger so snares and hats won’t over-trigger ducking, start with Ratio 4:1, Attack 1–5 ms, Release 60–120 ms, aim for roughly 3–6 dB GR for musical results, and use multiband or chain splitting when you want to protect mids. Automate duck intensity per section and keep sub frequencies mono for club clarity.

All right, go build your 16- or 32-bar loop, make that kick cut through, and keep the subs controlled and musical. If you want feedback, paste your compressor settings and routing or export a small project snippet — I’ll give targeted tweaks to make the sidechain work even harder for your track. Let’s make those subs massive but clean.