Sidechain Compression in Ableton Live: Make Techno Bass Pump
· re:union Radio editorial · 4 min read
Sidechain compression in Ableton Live: where to set the kick as trigger, which attack, release and ratio values help, and how the bass makes room.
Sidechain compression is why a techno bassline breathes with the kick: every hit of the kick drum pushes the bass down for a moment before it opens up again. The trick is simple – the compressor doesn’t listen to the signal it processes, but to a different track. Here you’ll find out where to set this up in Ableton Live and which starting values you can work with.
At a glance
- The Compressor sits on the bass or pad track, while the kick track serves as the external sidechain source.
- According to Ableton, the sidechain signal is only a trigger and is never heard in the mix.
- Gearnews suggests attack of 1–10 ms, a ratio of 4:1 to 10:1 and 6–12 dB of gain reduction as a starting point.
- Rule of thumb for the longest sensible release: 60,000 divided by the tempo in BPM.
Why the bass has to get out of the kick’s way
A compressor reduces gain as soon as a signal exceeds the threshold. The ratio sets how much: with a ratio of 3, a 3 dB rise at the input becomes only 1 dB at the output. With sidechaining, another track drives the compressor.
In techno that means: the kick hits, the compressor on the bass or pad reacts and briefly pulls the volume down. According to Gearnews, Daft Punk established the pumping effect as a defining element of electronic music with their productions of the early 2000s, and in Detroit and later Berlin it became a standard tool. The Live manual sums it up:
“Sidechaining/ducking is a dance music producer’s secret weapon because it can help to ensure that basslines (or even whole mixes) always make room for the kick drum.”
— Ableton, Live manual
Setting up sidechain in Ableton Live
Put the Compressor on the track that should duck – the bass, or even the Main track. Unfold the sidechain parameters with the toggle in the device’s title bar. Enable the Sidechain button and pick the kick track as the source in the chooser below.
The Gain knob only raises the level of the trigger, not the volume of the kick in the mix. With Dry/Wet at 100%, the sidechain source alone drives the compressor. Note that automatic Makeup is not available with an external sidechain. To learn how to build the kick itself before it drives the bass, read Techno production: kick drums like the pros.
Starting values for the pumping effect
Attack and release decide how the pumping sounds. Gearnews recommends the following starting values for classic techno pumping, complemented by the options from the Live manual:
| Attack | 1–10 ms |
|---|---|
| Release | 30–300 ms, depending on tempo |
| Ratio | 4:1 to 10:1 |
| Gain reduction | 6–12 dB |
| Maximum release at 128 BPM | approx. 468 ms (60,000 ÷ BPM) |
| Practical release at 128 BPM | 200–350 ms |
| Lookahead in Live’s Compressor | 0 ms, 1 ms or 10 ms |
| Modes | Peak, RMS, Expand |
The most common mistake, according to Gearnews, is a release that is too long. The compressor hasn’t fully opened when the next kick arrives, and the mix sounds muddy instead of punchy. Ableton itself warns that more than about 6 dB of gain reduction significantly alters the sound – for deliberate pumping that’s exactly the point, but on the Main track less is more.
Only a drum track? Sidechain EQ and multiband
If you don’t have an isolated kick, just a finished drum loop, the sidechain EQ helps. Select the low-pass filter and adjust frequency and Q so that only the kick triggers the compressor. The headphones button lets you hear the trigger signal on its own.
For dense arrangements, Gearnews describes multiband sidechain: 20–200 Hz ducks by 8–12 dB, 200 Hz to 2 kHz by only 2–4 dB, and everything above stays untouched. For the plugins that run in the studio otherwise, see The best techno plugins 2026.
Frequently asked questions
What is the difference between sidechain compression and ducking?
Ducking describes the audible result: a signal briefly gets quieter as soon as another one hits. Sidechain compression is the technique that creates it.
How do I avoid too much pumping?
Gearnews advises raising the threshold, reducing the ratio and shortening the release. In dense arrangements, multiband sidechain helps because only the bass range ducks hard.
Can I sidechain without a compressor?
Yes. With the ghost kick method, a silent kick track drives a volume automation on the target track. It works in any DAW without additional plugins and gives you full control over the curve shape.
Source: Ableton Live manual: Audio Effect Reference (Compressor), Gearnews: Sidechain Compression in Techno
