In this article
Multiband compression divides a signal into frequency bands and applies dynamics processing separately. It is useful when a problem changes over time and is concentrated in part of the spectrum.
First check whether a simpler tool will work
A constant tonal imbalance may need EQ. One loud note may need clip gain or automation. Multiband processing adds crossover filters and more controls, so choose it when separate dynamic control of a frequency region has a clear purpose.
1. Control an uneven bass register
Some bass notes may produce much more low-frequency energy than others. Set a band around the problematic region and adjust the threshold so it acts on the excess. Check that quieter notes retain their weight and that attack and release do not flatten the groove.
2. Tame intermittent harshness
A vocal, synth or resonant sound may become sharp only at certain moments. A high or midrange band can reduce those moments without permanently darkening the source. Compare with dynamic EQ, which may allow a more focused correction when only a narrow area is troublesome.
3. Make space with frequency-selective ducking
When the processor supports an external sidechain, another signal can trigger reduction in a selected band. For example, the kick can briefly reduce the bass’s lowest region. Verify the routing and band behavior in the specific plugin; not every multiband compressor exposes the same controls.
Recombine and level-match
Soloing a band helps locate the issue, but the decision belongs to the recombined sound. Match output level and listen across the whole arrangement. If the processed source loses body or movement, reduce the range or use a simpler correction.
Try this in your project
Find a sound with one occasional frequency problem. Compare static EQ, automation and multiband compression in three versions. Keep the method that controls the problem while changing the rest of the performance least.
Quick reference
| Focus | What to try | What to listen for |
|---|---|---|
| Uneven bass | Compress only the excessive region | More consistent weight across notes |
| Harsh moments | Reduce a band when it becomes intrusive | Clarity without permanent dullness |
| Masking | Use selective ducking where supported | Space without lowering the entire source |
Write the parts before mixing them
Captain Plugins helps you write chords, melody, bass and drum parts. Balance and process those parts with the mixing tools in your DAW; composition tools do not replace a mix or mastering workflow.
Captain Plugins 8 overview
See the update video for the current canvas and editing workflow.
Common questions
Is multiband compression always better than normal compression?
No. Broadband compression is simpler when the whole signal needs similar dynamic control.
Should I use it on every master?
No. Use it for an identifiable problem and compare its side effects carefully.