Master bus compression processes an entire multi-track mix or stem sum through a single stereo compressor to pin transients together. This unifies disparate dynamic elements, imparts cohesive analog punch, or creates deliberate gain-reduction pumping triggered by loud elements like kick drums.
How the songs in the archive use it
Perfect and Candy Shop sum stems through SSL G-Series master bus compressors to control dynamic transients and add punch, with Candy Shop applying a 4:1 ratio for low-end authority. Calvin Harris achieves an exaggerated pumping effect on Acceptable in the '80s by feeding the full mix through an Alesis 3630 compressor driven by a loud kick drum.
How to do it in Logic Pro
Master bus compression glues individual tracks into a unified stereo mix, adding cohesion and dynamic control. Use it on the Stereo Out channel strip during mixing to gently pin transients together.
Insert Compressor on the Stereo Out channel strip.
Select Vintage VCA using Circuit Type to achieve a classic mix-bus glue character.
Adjust Threshold until the meter shows 1 to 3 dB of gain reduction during the loudest sections.
Set Attack slow enough to preserve drum punch and Release to return smoothly with the track tempo.
Increase Make Up to match the uncompressed perceived loudness.
Plug-in
Control
Value
Listen for
Compressor
Circuit Type
Vintage VCA
smooth, cohesive analog-style glue
Compressor
Ratio
2:1
gentle mix-wide dynamic reduction
Compressor
Attack
30 ms
intact initial drum punch and transients
Compressor
Release
100 ms
natural rebound between beats
Compressor
Make Up
2 dB
equal overall volume before and after compression
A general method with Logic Pro's own plug-ins. Control names are checked against Apple's manual; the values are starting points, so adjust them by ear.
Songs that use it (2)
What each track sheet's analysis found, with the sheet's own score. Analysis, not verified credits.
Perfect by Ed SheeranHybrid Console Summing: Summing discrete digital stem returns through an SSL 4000 G-Series desk with master bus compression for cohesive analog punch.Sheet score 6/10 · Source given: Corroborated by verified sister session logs for 'Shape of You' / Mark Stent mix documentation; Inferred: not confirmed against Discogs/MusicBrainz · Open the full track sheet
Acceptable in the '80s by Calvin HarrisMaster Bus Pumping: Instead of setting up complex internal routing (impossible on the Amiga), Harris routed the entire mix through an Alesis 3630 compressor, allowing the loud kick drum sample to compress the rest of the track, yielding the exaggerated "French Touch" pumping effect.Sheet score 9/10 · Source given: SOS interview deductions · Open the full track sheet
Want these sounds in your own mixes? Every song above has a full track sheet with its signal chains and a step-by-step recreation for your DAW. Open Track DiveAll techniques