What is sidechain compression?

Sidechain compression uses one signal (typically a kick drum) to trigger compression on another signal (typically a bass or pad). This creates the characteristic pumping effect heard in electronic dance music, where the bass ducks out of the way of each kick hit.

How fast should the attack be for sidechain compression?

For a classic EDM pump: 1-5ms attack (very fast). For a subtle duck: 10-30ms. For a smooth, transparent feel: 5-15ms. The attack should be fast enough to duck the signal before the kick transient passes, but not so fast it causes clicking.

How do I set the release time for sidechain?

The release should allow the signal to return to full volume before the next kick hit. At 128 BPM, one beat = 468ms. A release of 200-350ms (about 50-75% of the beat) gives a classic pump. Shorter release creates more aggressive pumping, longer release creates a smoother curve.

Can I sidechain without a compressor?

Yes. Many producers use volume automation or dedicated sidechain shaper plugins (LFO Tool, VolumeShaper, Kickstart) for more precise control. These allow you to draw the exact ducking curve shape, which can sound cleaner than a compressor.

AudioCalcs

Sidechain Calculator — Kick-Triggered Ducking Timing

Calculate sidechain filter frequencies and timing for kick-triggered ducking.

BPM

Beat Division

1 = quarter note, 0.5 = eighth note

Ducking Depth

Attack %

Release %

How We Calculate This

Cycle Time

Cycle (ms) = (60,000 / BPM) × beat division

Attack & Release

Attack = Cycle × attack %

Release = Cycle × release %

Hold = Cycle − Attack − Release

The attack, hold and release should sum to one cycle. Adjust percentages so the signal returns to full volume before the next trigger.

Frequently Asked Questions

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Last updated: February 2026

All calculations are estimates based on standard formulas. Always verify results for critical applications.