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Capitol Mastering Compressor

Capitol Mastering Compressor

Get the legendary tube compressor from Capitol Studios.

  • Give your tracks the velvet touch of Capitol's handbuilt mastering compressor, the CM5511
  • Get the pro sonics of the same hardware used on catalogs from Capitol, Blue Note, Motown, Verve, and more
  • Easily increase perceived loudness and texture in your productions with Saturator, Mix, and Headroom controls
  • Tighten your low end and expand your stereo width using simple Mono Fold and Mid/Side features

Runs natively on your macOS or Windows computer without UA hardware. View full system requirements.

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Hear It In Action

Plug-In:

Hear It In Action

Hear It In Action

Plug-In:

Hear It In Action

Plug-In:

Get the Legendary Tube Compressor from Capitol Studios.

Capitol Mastering Compressor gives you the rich sound of the CM5511 — a legendary handbuilt tube mastering compressor designed and used by Capitol Studios on historic catalogs and thousands of hit records. Exclusively modeled by UA, now you can get the same professional finishing touch previously only available at Capitol Studios.

Get the Exclusive Sound of Capitol Mastering

The CM5511 compressor has mastered entire catalogs from Capitol, Motown, Blue Note, Def Jam, and dozens more, as well as modern records by Black Sabbath, Demi Lovato, and Selena Gomez.* Inspired by vintage Fairchild 670 and Gates Sta‑Level tube limiters — and designed for consistent results across Capitol's four mastering rooms — Capitol Mastering Compressor is an exacting emulation of this "spare no expense" hardware, giving you the modern tube-based sound of this custom-made dynamics masterpiece.

Expanded Controls for Complete In‑The‑Box Mastering

Easily tighten low end, add subtle saturation, and tweak the stereo field with easy‑to‑use "plug‑in only" controls. Plus, comprehensive dBFS and LUFS metering and sidechain filter means you have a full-featured, modern mastering tool at your fingertips.

Add Expensive Sound to your Instrument Groups

Not just for the 2‑bus, Capitol Mastering Compressor will add its tube‑based magic to your drum bus, synths, background vocals, and more, giving you the gorgeous dynamics control only achievable with this one‑of‑a‑kind, hit‑proven hardware.

Frequently Asked Questions

No. These plug-ins run natively on your computer. No UA hardware is required.

Yes, 14-day plug-in demos are available. Find eligible plug‑ins

We provide three activations per license. We support activation on your computer or on an iLok USB key.

Native plug-ins are supported on macOS and Windows systems. See our Native UAD System Requirements article for full system requirements. An iLok account is required for managing your native plug-in licenses. We support iLok USB keys for portability, but one is not required.

Check our Knowledge Base for additional questions

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*Use of artist names does not constitute official endorsement of Capitol Mastering Compressor software.