Meet your new favorite FET compressor
Terrific on bass guitars, kicks, vocals, parallel processing, buses and more, the 1176 is one of the most iconic limiters of all time for good reason. With the MC77 you have access to the same unrivaled tone and lightning-fast response as the original 1176, with the added bonus of onboard sidechaining, stereo linking, and more.

A legend reborn
How do you take a legendary compressor like the 1176 and not only do it justice, but improve on it? This was the vision behind the MC77, created by Purple Audio in the late nineties. It all started with an exacting recreation of the “E” revision of one of the most iconic solid-state limiting amplifiers of all time. From there, impeccable high-performance components were used to match the unit to the original, while adding modern features to its all-discrete signal path.

Classic dynamics in the 21st Century
The MC77 employs Field Effect Transistor (FET) technology for gain reduction allowing for large amounts of limiting without introducing severe distortion. Its remarkably quick attack time, flexible release, four ratios and multi-button modes allow the MC77 to deliver everything from well mannered and transparent dynamics to full-on brick wall stopping power.

Brainworx ‘sweetens the pot’
The Brainworx team didn't stop after finishing this pristine emulation from the ground up. They added TMT technology to provide many different analog units of the MC77 in one plugin. Use it to perfect your stereo field with its onboard M/S mode, monomaker and stereo width control. Get perfect gain staging without changing your levels thanks to the headroom knob, tailor the compressors response with integrated sidechain filters, and achieve instant parallel processing with the mix control.


  • Exacting emulation of the original Purple Audio MC77 Limiter
  • TMT — Brainworx patent-registered “Tolerance Modeling Technology” (US Patent No. 10,725,727)
  • Fully endorsed by Purple Audio
  • Ultra Fast Attack Times from 20 to 800 microseconds
  • Variable Release Times from 50 milliseconds to 1.1 second
  • Authentic ALL BUTTON mode
  • Patented TMT technology for multiple units in one plugin
    M/S Processing
  • Mono-Maker and Stereo Width control
    Parallel Mix
  • Headroom control

Audio Examples

Industry Reviews

  • Mike Exeter

    Mike Exeter

    Producer and Sound Engineer (Black Sabbath, Judas Priest, Cradle of Filth)

    The Purple MC77 immediately struck me as having been developed by people who listen. It sounds great and was excellent on Vocals, Acoustic Guitar and Snare. The linked Input and Output controls… Read More

  • Jay Ruston

    Jay Ruston

    Anthrax, Stone Sour, Amon Amarth, Steel Panther

    The MC77 limiter plugin really surprised me. It sounds absolutely incredible on drums, bass, as well as vocals. The compression doesn’t start immediately pumping badly like other emulations out… Read More

  • Daniel Wyatt

    Daniel Wyatt

    Multi-platinum Audio Engineer (Curtis Mayfield, Mos Def, Sugar Ray, The Roots)

    Stunner. An immaculate modeling of one of the best neo-classic compressors ever made! Sounds and feels just like the hardware — but it’s packed with tons of extra super-useful options.… Read More

Customer Reviews

  • In a class of its own

    by Ettienne Lane
    I compared the MC77 plugin to a hardware 1176 from one of these cloud services and the MC77 plugin sounded way better in my opinion.
    It does something magical on kick and bass. If you slam the… Read More
  • Amazing Compressor!!!

    by ZM1111
    I have to say, after trying a few different 1176 emulators, this one is the best hands down. For whatever reason, Purple Audio is able to capture a warmth and overall fullness that other compressor… Read More
  • Snappy

    by Aud10Keb
    This is good snappy compressor that you can also use as an interesting distortion unit. It has an excellent range of control and the extra add-ons at the bottom really help you dial in the exact snap… Read More
  • Amazing limiting amplifier!

    by Studio Mixing & Mastering
    In all my 6 years of sound engineering, I have used a lot of different emulations of the legendary 1176 Limiting Amplifier and this MC77 as well. From Avid, Waves, IK TR5 and the Universal Audio… Read More
  • Need a musical compressor? Here it is!

    by Der Heine
    This compressor is created for unique Sounddesign. Specially for Drumloops or Lead Sounds it will be a great weapon:-) Very musical!


Supported Plugin Formats
AAX DSP, AAX Native, AU, AAX AudioSuite, VST2, VST3

Supported Operating Systems
macOS 12 down to macOS 10.11
Windows 11 down to Windows 8

Intel, or Apple Silicon (except for AAX) architecture

x64-compatible CPU

System Requirements
Display resolution: 1440 × 900px or 1280 × 960px or higher
Memory: 2 GB RAM


With the Installation Manager you can select, download & install all the Plugin Alliance products. Select any and all formats you need for your system! Mac & PC.



Purple Audio MC 77 - Changelog

Version 1.4.1 (Jun 28, 2022)
- General: Fixed potential blacklisting of VST2 on Windows
- General: Fixed potential crashes on Windows
- General: Fixed processing being Mono with VST2 in FL Studio
- General: Fixed value readouts not being present when clicking knob

Version 1.4 (Mar 15, 2022)
- General: added native Apple Silicon compatibility for VST3, VST2 and AU
- General: added macOS Monterey support
- General: added Windows 11 and Windows 10 21H1 support
- General: discontinued Windows 7 support
- General: discontinued macOS 10.9 and 10.11 support
- General: fixed metering behavior in block sizes of 2048 samples and higher

Version 1.3 (Mar 22, 2021)
- General: Compatibility with Logic on Apple Silicon devices via the Rosetta-2 layer
- General: Fixed possible artefacts when freezing or bouncing tracks in Pro Tools
- General: Fixed automation highlighting disappearing in Studio One
- General: Improved license dialog visibility in dark mode

Version 1.2.1 (Jun 30, 2020)
- Fixed DC offset pop on render and playback start

Version 1.2 (May 27, 2020)
- General: Qualified for use with the Windows 10 May 2020 Update
- General: VST3: Fixed potential hangs in a DAW upon loading
- General: Fixed logical issues in undo / redo behavior
- General: Fixed UI resizing issues in Ableton Live on Windows
- General: Fixed audio processing initialization issues on amp and delay products
- Fixed issues with DC signal

Version 1.1 (Nov 06, 2019)
- General: Qualified for use with macOS 10.15 Catalina
- General: Qualified for use with Windows 10 November 2019 Update
- General: Fixed plugin validation in Logic under macOS Catalina
- General: Fixed preset name restore in Logic when reopening a session
- General: Fixed opening authorization dialog triggering automation
- General: Improved instantiation times for plugins
- General: Improved license functionality and branding for subscription
- General: Removed 32-bit support on macOS and Windows
- Fixed ratio hold buttons being linked between instances

Version 1.0 (July 10, 2019)
- Initial release