The fastest way to make the kick cut through is to put a compressor on the bass and key it to the kick, using a fast attack and a tempo-aware release for clarity, or a higher ratio and longer release for pumping. Both approaches solve the same problem: the kick and bass fighting for the same low-frequency space. If you need more surgical control, dynamic EQ or an HPF-triggered duck will get you there without touching the whole signal.
TL;DR:
- Route the kick into the bass compressor’s external key input, then confirm the gain reduction meter moves with each kick before adjusting settings.
- Use a 2:1 to 4:1 ratio with a moderate threshold for subtle control; choose 6:1 or higher and a longer release for pronounced pumping.
- Apply a high pass filter to the trigger around 60 to 100 Hz, adjusting the cutoff to the kick’s sub energy.
- Use dynamic EQ when the bass needs to retain its fundamental; it ducks only clashing frequencies instead of reducing the whole signal.
- If the duck distorts, lengthen the release, reduce input gain, or lower the ratio; check gain staging first when low frequency artifacts appear.
Table of Contents
- Quick routing checklist for any DAW
- Compressor settings that actually shape the sound
- Filtering the sidechain and alternatives to compression
- Advanced techniques for tighter groove
- Common problems and how to fix them
- Why objective feedback sharpens sidechain decisions
- Get a second opinion on your kick and bass balance
- FAQ
- Sources
Quick routing checklist for any DAW
The mechanics are nearly identical whether you work in Ableton, Logic, Pro Tools, Cubase or Reaper. Once you have done it a couple of times, it becomes muscle memory.
- Insert a compressor on the bass track and switch on its external sidechain or key input.
- Route the kick to that compressor, either through an aux send or the plugin's sidechain dropdown menu.
- Where available, enable the audition or listen function so you can hear exactly what signal is triggering the compressor.
- If your DAW has no explicit external sidechain option, send the kick to a muted bus and use that as the trigger, or lean on the host's own sidechain-capable devices.
- Confirm it is working by soloing the sidechain input or watching the compressor's gain reduction meter move in time with the kick.
FabFilter's Pro-C manual walks through this routing across several hosts and is worth bookmarking the first time you set this up, since the menu names differ more than the underlying logic does. The same principle appears across most modern compressors: enable the key input, point it at the kick, and watch the meter confirm the trigger before you touch a single knob. As Kiive Audio points out, many compressors also include a sidechain filter so the trigger itself ignores low-end rumble, which matters more than most producers expect.
Compressor settings that actually shape the sound
Once the routing works, the parameters decide whether your listener notices anything at all or feels the groove pumping.
- Attack: a very fast attack time gives near-instant ducking; a slightly slower attack can let some of the kick transient pass through, which can feel more natural depending on the bass patch.
- Release: short release times produce subtle, almost invisible ducking; longer or tempo-synced releases create the obvious pumping sound associated with house and techno.
- Ratio and threshold: 2:1 to 4:1 with a moderate threshold works as a transparency tool; 6:1 or higher with a lower threshold pushes you into creative pumping territory.
- Placement: most engineers put the sidechain compressor after EQ shaping and saturation but before any final limiting, though A/B testing against your own chain is the only way to know for certain.
Sonarworks frames this well: sidechain compression can serve as a functional mixing tool or a creative rhythmic effect, and your attack, release and ratio choices are what decide which one you get. Very short release times can interact badly with the sub's own waveform cycle, so watch for audible flutter at extreme settings.
Pro Tip: Set the sidechain filter on your compressor to high-pass the trigger signal around 60 to 100 Hz, so the compressor reacts to the kick's punch rather than its sub-bass tail.
Filtering the sidechain and alternatives to compression
A compressor keyed to a full-range kick signal will often over-react to low-frequency energy that was never the problem in the first place. Filtering the trigger fixes this cleanly.
- High-pass the sidechain input at a low frequency to ensure the compressor responds mainly to the attack rather than the sub bass rumble, adjusting the cutoff based on the kick's sub energy.
- Dynamic EQ lets you duck only the frequency band where kick and bass genuinely clash, leaving the rest of the bass signal untouched, which iZotope recommends when you want rhythmic separation without losing low-end body.
- Sidechained gates and HPF-envelope tricks can achieve a cleaner, more surgical duck with less of the broadband pumping a standard compressor introduces.
Each of these trades some simplicity for precision. A compressor is still the fastest route to a usable mix, but dynamic EQ earns its place when the bass needs to keep its fundamental while the upper harmonics step aside for the kick.
Advanced techniques for tighter groove
Once the basics are solid, a few tricks separate a functional sidechain from one that feels genuinely musical.
Building a muted "ghost" kick, a transient-only copy nudged slightly earlier, gives you a cleaner, click-free trigger than the raw kick track, an approach Audient describes well for avoiding bleed from snares or hats. Parallel sidechaining, where you duck an entire bus rather than a single bass track, keeps the whole low end moving together instead of just one element. Mid/side processing lets you compress the mid channel selectively, protecting mono compatibility while keeping stereo width in the side. Reverb and other time-based effects generally sound best placed after the duck, since SoundBridge notes that placing them before the compressor chops tails unnaturally.
Common problems and how to fix them
Most sidechain issues trace back to one of three causes.
- Distortion on the duck: lengthen the release, reduce the gain going into the compressor, or back off the ratio.
- Pumping at the sub-cycle level: increase the release time or switch to a tempo-synced value, and check for phase cancellation between kick and bass.
- Kick losing its weight: swap to frequency-selective ducking or EQ that preserves the fundamental, or try transient shaping instead of a heavy compressor duck.
MusicRadar traces most low-frequency artefacts back to poor gain staging into the compressor rather than the release time itself, which is usually the first thing worth checking.
Why objective feedback sharpens sidechain decisions
We treat sidechaining as both a technical fix and a creative choice, and getting the balance right by ear alone is harder than it sounds once you have been staring at the same session for hours. Objective mix feedback flags masking between kick and bass that your ears have stopped noticing and suggests concrete parameter adjustments rather than vague advice. Combining measurement with your own judgement is how low end actually translates once it leaves your studio monitors.
— AubioMix
Get a second opinion on your kick and bass balance
We built AubioMix so you do not have to guess whether your sidechain settings are actually working once the track leaves your room. Upload a mix and we return detailed feedback across compression, frequency masking and transient shaping, flagging exactly where kick and bass are still competing.
- Pinpoints masking between kick and bass rather than leaving you to hunt for it by ear.
- Gives you concrete next steps on attack, release and ratio instead of generic mixing advice.
- Checks your low end against genre benchmarks before you commit to mastering.
A single Mix Review costs £4.99, or you can subscribe to the Professional plan at £19.99 per month if you are refining tracks regularly. Head to our pricing page and upload your next mix before you finalise it.
FAQ
How do you sidechain your kick and bass?
Put a compressor on the bass track, enable its external sidechain or key input, and route the kick into that input through an aux send or the plugin's sidechain menu. Start with a fast attack and a short release for subtle clarity, or a longer release and higher ratio for an audible pump.
How do you make sub bass sound better?
Keep the sub bass mono below roughly 100 Hz to avoid phase issues on smaller speakers, and use sidechain compression or dynamic EQ to clear space whenever the kick lands. Transient shaping on the kick, rather than heavier ducking, often preserves more of the sub's weight.
Should the kick be in mono or stereo?
Most engineers keep the kick's low-frequency content in mono, since stereo information below around 100 Hz tends to cause phase cancellation and weakens translation across systems. Any stereo width on the kick usually comes from higher-frequency elements like the beater transient or room tone, not the sub.
How do you do sidechain compression in Logic?
In Logic Pro, insert a compressor on the bass channel, open its sidechain menu, and select the kick track as the source. Adjust attack, release and ratio from there, and use a spectrum or EQ plugin first to confirm where the kick and bass actually overlap, as MusicTech suggests before reaching for heavier compression.
Sources
- Sidechain compression explained — Kiive Audio
- Maximize Your Mix’s Clarity and Groove with Sidechain Compression — Sonarworks
- External sidechaining — FabFilter Pro-C manual
- 11 creative sidechain compression techniques — iZotope