Kick and 808 Sidechain in Ableton: Keep the Punch

Kick hits on beats one and three. The second bar delays the bass entrance by one sixteenth note.

Put stock Compressor on the 808 track, enable its external sidechain and select the kick as the source. Start with a small dip, then shape how quickly the bass returns. The kick supplies the trigger; the 808 is the sound being turned down.

This route uses stock Compressor, included in Live 12 Intro, Standard and Suite. The screenshots use Live 12 Suite 12.4.6. It works on an audio 808, a sampler or a bass synth because the effect processes the track’s audio output. Keep your original bass part available for comparison.

Check whether ducking solves the actual problem

Loop the busiest two bars with the drums and melody. Before inserting anything, lower the bass slightly and compare a shorter kick. If that already gives you the rhythm you want, keep it. Ducking is useful when the collision happens at particular kick hits; it cannot choose better notes or fix an unsuitable bass register.

Try a sustained G1 bass note beneath a kick on beats one and three. Then try the same phrase with the bass entering after the kick. The second arrangement may need less ducking. Keep the notes and velocities fixed while testing the compressor so a musical edit does not disguise what the effect changes.

For choosing the sounds first, read How to Choose an 808 That Actually Works With Your Kick.

Route the trigger into the bass compressor

1. Insert Compressor on the 808 track, rather than the kick or Main track.

2. Unfold the sidechain section using the small triangle at the device’s upper left. Enable External and choose your kick under Source. In other Live 12 layouts, these controls are labelled Sidechain and Audio From.

3. Choose Post FX as the source point. Leave SC Filter off for this first test, with SC Gain at 0 dB. Keep the kick’s processing unchanged while comparing.

4. Set the sidechain Mix to 100% (called sidechain Dry/Wet in other layouts). Turn the headphones/Listen button off after checking the trigger. This Mix is separate from the compressor’s main Dry/Wet control.

Choose the kick as the trigger. Post FX, Mix 100% and SC Filter off keep this first test easy to follow.

Play a kick hit while the 808 sustains. Lower Threshold gradually until the gain-reduction display moves at that hit. If it stays still, check the source and routing before changing attack or release. If the display follows the bass phrase instead, recheck external Sidechain and its Dry/Wet setting.

Set depth before chasing speed

For a controlled first comparison, try Peak mode, Ratio 4:1, Attack 2 ms, Release 100 ms, Auto Release off and the main Dry/Wet at 100%. Keep Output at 0 dB, Knee at 6 dB, Lookahead at 0 ms and the envelope mode at Log. These are starting values to audition, not a preset that fits every kick. Lower Threshold for roughly 2–4 dB of reduction on a representative hit, then compare a smaller dip. The screenshot uses −12 dB Threshold with this particular kick; copy the reduction goal rather than that threshold number.

A starting point, not a universal preset: 2 ms attack, 100 ms release and 4:1 ratio. Adjust Threshold for your kick.

Ask whether you can recognise the kick rhythm and still follow the bass line. If the kick only becomes clear when the 808 is almost silenced, revisit the sound selection and note placement. Increasing the output to replace all the lost level can undo the space you were trying to create.

Fit recovery to the next bass event

Compare Release at 50, 100 and 200 ms while leaving the trigger and Threshold fixed. Focus on the next bass note after each kick. Does it emerge clearly, or arrive inside a long dip? A deliberate swell can support one groove and weaken another. Choose the recovery in the full phrase, not from the soloed compressor display.

At 120 BPM, a sixteenth note occupies 125 ms. Use that as a rhythmic reference, not an instruction to set Release to 125 ms: the kick’s tail and the compressor’s response also affect the dip. A long kick can keep triggering compression after its initial impact.

Only Release changed to 200 ms here. Compare the recovery curve with the 100 ms view above, then judge the bass phrase.

Fix the failure you can actually identify

• Bass disappears through the phrase: raise Threshold to reduce the dip, then compare a shorter recovery. Check a long kick tail before blaming Release alone.

• Kick still feels buried at the start: audition a quicker Attack at the same depth, and check whether the bass note could begin later. Stop if the bass becomes rough or loses its useful attack.

• Buzzing or clicks: reduce the depth and compare a slower response. Do not assume the shortest attack/release values are the cleanest.

• Trigger changes when you rebalance the kick: inspect the selected routing point. Keep it fixed while testing; changing the detector level changes how often Threshold is exceeded.

• Wrong sound comes out while checking: turn sidechain Listen off before judging the bass output.

Keep the version that supports the beat

Switch Compressor off and on with the same loop. Keep monitoring comfortable and avoid choosing a version simply because it is louder. First judge the kick’s outline; then follow the bass notes through the gaps. Restore the full arrangement before deciding. If the untreated version has a clearer groove, reduce the processing or keep the musical edit instead.

If the bass is still hard to follow, read Why Your 808 Sounds Big Solo but Disappears in the Beat.

Ableton’s Compressor reference explains the external detector and sidechain Listen controls.

If you need another bass source to compare, explore the DS Ultimate Bass Sample Pack. Choose the sound before deciding how much ducking it needs.

Explore the Ultimate Bass Sample Pack