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Open Compressor

Open Compressor

The all-in-one compressor that shows you under the hood

£72.00 GBP
£89.00 GBP £72.00 GBP
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Peek under the hood

Open Compressor combines the core components of all your favourite compressors - plus Clipping, Limiting, Auto-Threshold, and more.

But there’s a twist: by showing you exactly what’s happening under the hood at every stage, we help you develop a deeper understanding of the technical processes at play, and provide the information you need to make better decisions for your music. 

See the science behind the sound

Open Compressor’s confusion-free layout uses enhanced real-time visual analysis, an easy to navigate UI, and clear terminology, to bring you closer to your sound.

With a diverse range of processing tools at your fingertips, you can dial in the exact sound you want while getting instant visual feedback, helping you grasp the art and science of dynamics processing.

Take back control, put yourself in the pilot seat

The modular approach lets you tailor the topology to your signal, and even mimic classic hardware with Peak/RMS operating modes, Feedforward/Feedback architecture, and Regular/Optical ballistic (attack & release) models.

By putting you in the pilot seat, with nothing hidden or automated happening behind the scenes, we empower you to take back control of your audio.

Maintain your creative freedom

A versatile feature set provides starting points for a range of creative processing styles. Take your sound in any direction, from smooth and controlled to bold and brash, or recreate your favourite studio gear by dialling in the settings that define their unique character.

Odd and even saturation, tone control, clipping, limiting, downward expansion, and upward compression give you endless control, while enhanced visualisers show you how parameters are impacting your sound.

Your new "go-to" compressor

This plugin is designed to be a workhorse compressor, capable of a wide range of sounds and functions.

Of course, there will always be room for your favorite dedicated emulations of classic hardware...

But if you want one compressor that can get the job done 99% of the time, Open Compressor could be the "do-everything" tool for you.

The easy way to control dynamics

A conventional compressor’s threshold control sets a fixed point (in dB), above which compression takes place. This is great when your source signal is consistent, but when you have lots of gain variation, the compressor will only be affecting the loudest parts.

Using Auto-Threshold, you can apply compression in a variable way, regardless of a signal’s absolute level, and obtain the same tone on your whole signal without losing overall dynamics. Great for expressive vocal takes or dynamic drums.

Control transients before they hit the compressor

It can be difficult to find the balance between fast, aggressive compression that successfully controls transients; and smoother, slower compression that adds character and punch.

With Open Compressor, the clipper and limiter come before the compressor in the signal chain. That means you can catch and control transients in one click using the handy Detect feature, then shape the compressor to sound exactly the way you want, without compromise.

  • Waveform visualiser

    Wet/dry waveform, gain reduction lines and threshold lines for compressor, clipper, and limiter.

  • EQ visualiser

    Tone control curve and spectrum analyser.

  • Harmonic saturation visualiser

    Odd/even harmonic mix and overtones.

  • Knee visualiser

    Shows shape of compressor knee and gain-reduction status on the curve.

  • Oscilloscope

    Shows the shape of the waveform as you add clipping and saturation.

  • Full-screen waveform

    Zoom in to see the Waveform view in higher resolution and fine-tune your settings.

Key Features

    • Flexible compressor controls - Threshold, Ratio (1:1 to 24:1), Attack (20 microseconds to 250 milliseconds), Release (25 milliseconds to 5 seconds), Knee (0dB to 18dB).
    • Auto makeup gain - Automatically volume balance the compressor stage to allow for easy A/Bing.
    • Auto output gain - Accommodate for changes in volume due to saturation and the other additional processors.
    • Regular/Optical modes - In Regular mode, attack and release curves are linear. In Optical mode, the attack time is variable, and the the release curve has two stages (50% in 1 second, then a slower tail for the remaining 50%).
    • Detector HPF/LPF - Apply a high-pass or low-pass filter to the detector/sidechain circuit to shape what the compressor hears.
    • Lookahead control - Anticipates peaks in your signals so you can ride levels without changing tone. Stepped dial with 0ms, 2ms, 5ms, 10ms.
    • Closed/Open views - Compact “Closed” view (no visualisers, controls only) and expanded “Open” view (all controls and visualisers).
    • Saturator - Dedicated Odd and Even drive knobs with bypass switch.
    • Limit - One-knob limiter with versatile settings that allow for aggressive limiting while still sounding natural. The dial controls the threshold. The limiter comes after clipping and before compression in the signal chain. Dedicated bypass switch.
    • Oversampling (Low and High) - In Low mode, oversampling is applied at a 2x factor to Odd/Even saturation, but no oversampling is applied to the compressor. In High mode, oversampling applied to both the saturation and the compressor at a 4x factor (vital for fast attack times).
    • Low Level control - Make low level information quieter or louder by turning left for downward expansion, or right for upward compression.
    • EQ visualiser - EQ curve shows what processing the Tone dial is applying. Spectrum analyser shows output signal.
    • Knee visualiser - Shows shape and range of compressor knee and gain-reduction status on the curve.
    • External sidechain - Sidechain the compressor to an external signal. HPF, LPF and Lookahead will now apply to the external sidechain audio.
    • L/R, Mid/Side, Link/Unlink modes - Allows you to process your audio in a range of stereo configurations.
    • Analogue compressor preset library - Recreate a range of different analogue compressors using the powerful built-in flexibility of the plugin.
    • GPU graphics - Waveform visualiser and spectrum analyzer leverage GPU for increased performance.
    • Value typing - Double click to type in values.
    • Dynamic window resizing - Simply drag from the bottom right corner to resize the plugin.
    • Minimum requirements - maOC 10.13, Windows 10
    • VST and AU available now.
    • AAX format later in October.
    • Auto Threshold - Source-dependent threshold setting (Auto) applies consistent gain reduction regardless of the input level.
    • Auto Release - The release time is scaled intelligently based on the source material, between 250ms and 8s. More gain reduction means a longer release.
    • Dry/Wet control - Control the level of the wet and dry signals to apply parallel processing.
    • RMS/Peak modes - Change the compressor detector circuit from Peak to RMS. Multiple RMS windows available (5ms, 10ms, 25ms, 50ms, 100ms).
    • F-FWD/F-BACK modes - In Feedforward mode, the detector is before the gain reduction stage, like most digital compressors. In Feedback mode, the detector is after the gain reduction stage, like most analogue compressors.
    • Delta listen - Hear exactly what the plugin is doing by listening to the delta (aka difference) between the dry and wet signal.
    • Waveform fullscreen view - Zoom in to see the Waveform view in higher resolution and fine-tune your settings. The main controls are still available in a smaller top panel (compressor controls, HPF/LPF, Clip, Limit).
    • Clip - One-knob soft clipper. The dial controls the threshold. Clipper comes before Limiting and Compression in the signal chain. Dedicated bypass switch.
    • Detect button for Clip/Limit - Enable to start listening to the audio and detect the loudest transients. The Clip threshold is then set 1dB below the loudest peak, and the Limit threshold is set to 2dB below the loudest peak. You can manually adjust from there.
    • Tone control - Applies a low and high shelf to make the signal darker or brighter (turn left for darker, right for brighter).
    • Waveform visualiser - Wet/dry waveform, gain reduction lines and threshold lines for compressor, clipper, and limiter. Pause function to freeze waveform. Zoom in/out.
    • Harmonic saturation visualiser - Odd/even harmonic mix and overtones. See exactly what multiples/orders of harmonics are being applied.
    • Oscilloscope - Shows how the plugin is shaping the waveform as you add clipping and saturation.
    • Input/Output VU metering - Switch the main VU meter from GR (gain reduction) to input or output
    • Built-in presets manager - Navigate included presets and save your own presets within the plugin.
    • Versatile bypass controls - Built in bypass for the entire plugin, plus dedicated bypass controls for the Clipper, Limiter, Saturation, and Low Level controls to allow for easy A/Bing within the plugin.
    • Value windows - Exact values of each dial shown on hover.
    • Low CPU load - Optimized for efficient CPU usage, allowing a large number of instances. CPU load is lower than comparable compressors on the market with basic settings and Low oversampling mode enabled.

Frequently Asked Questions

What makes this compressor unique?

We built this compressor because we're very aware of the fact that compression is often the most difficult tool for people to understand.

We set out to build a compressor that would help you understand compression by effectively seeing inside the compressor, while also being a world-class swiss army knife plugin that any engineer would use.

Open Compressor is designed to give you all-in-one functionality (with clipping, limiting, saturation, and more) and allow you to effectively recreate any compressor you want using foundational, component-level controls, while simultaneously revealing what's actually happening under the hood. That way, you can develop a deeper understanding of the technical processes at play, and make better decisions for your music.

How does pre-ordering work?

By pre-ordering Open Compressor on this page, you will get a discount of 30% compared to the regular price of $119. When the plugin launches on October 2nd 2025, you will get an email from Woodstock Audio with your download link and activation code.

Can I try the plugin before I pre-order it?

We will have a trial option available after we launch to the public, but right now there is no way to try the plugin.

However, we are also including a 14-day refund policy which we will extend to 14 days after the public launch - so you can pre-order now to lock in the discount and bonuses, then you have 14 days to play around with the compressor and simply email support@woodstockaudio.com if you change your mind.

What's the refund policy?

We are also including a 14-day refund policy which we will extend to 14 days after the public launch. Simply email support@woodstockaudio.com if you change your mind after getting your hands on the plugin.

What versions (VST, AU, AAX) will be available at launch?

VST and AU will be available on October 2nd, AAX will come later in October/November, but you can still pre-order on this page to lock in the discount.

What bonuses are included for pre-ordering?

Bonus #1 - Win an AudioScape Opto Comp

Everyone who pre-orders will be automatically entered into a prize draw to win an AudioScape Opto Comp analog compressor. The winner will be selected at random.

Bonus #2 - Ticket to Open Compressor Masterclass.

This is an exclusive full-day virtual event only for those who pre-order. We’ll deep dive into Open Compressor and show you how to get the absolute most out of it.

*What are the terms and conditions for the AudioScape Buss Compressor prize giveaway?

1. Promoter

This promotion (“Promotion”) is organized and operated by Mastering.com Inc. (“Promoter”).

2. Eligibility

The Promotion is open to legal residents of the United Kingdom, United States, Canada, and the European Union aged 18 years or older at the time of entry.

Employees, contractors, or agents of the Promoter and their immediate families are not eligible.

3. Promotion Period

The Promotion starts on 11th September, 2025, and ends at 23:59 Eastern Time on 1st October, 2025  (“Promotion Period”).

4. How to Enter

There are two ways to enter:

(a) Pre-Order Entry:
Eligible participants who pre-order the Open Compressor during the Promotion Period will automatically receive one entry into the prize draw.

(b) Free Entry (No Purchase Necessary):
To enter without making a purchase, send a hand-written postcard with your full name, email address, and mailing address to:

Mastering.com Inc., 3 Germay Dr, Unit 4 #2585, Wilmington, DE 19804

Each postcard counts as one entry. Only one entry per person per method. Postcards must be received before the end of the Promotion Period to be valid.

5. Prize

One winner will receive an AudioScape Buss Compressor (“Prize”).

The Prize is non-transferable, non-exchangeable, and no cash alternative will be offered.

The Promoter reserves the right to substitute the Prize for an alternative of equal or greater value if necessary.

6. Winner Selection and Notification

The winner will be selected at random from all eligible entries within 30 days after the Promotion Period ends.

The winner will be notified via email within 30 days.

If the winner does not respond within 30 days of notification, the Promoter may select an alternate winner.

Delivery time and shipping time will be dependent on stock, availability and winner location.

7. Publicity

By entering, participants agree that their name and country may be published on the Promoter’s website or social media channels in connection with the Promotion.

8. Data Protection

Personal data will be processed solely for the purpose of administering the Promotion and in accordance with applicable data protection laws. See our Privacy Policy link via our main website at www.mastering.com

9. General Conditions

Entries that are incomplete, illegible, or received after the closing date will not be accepted.

The Promoter reserves the right to cancel, amend, or suspend the Promotion where necessary due to circumstances beyond its control.

These Terms & Conditions are governed by the laws of United States, and disputes will be subject to the exclusive jurisdiction of the courts of Delaware, United States.

What are the system requirements?

macOS — 10.13+ (Intel) / 11+ (Apple Silicon). Formats at launch: AU & VST3. 64-bit DAW. 4 GB RAM (8 GB recommended). 200 MB disk. iLok account (Cloud or machine activation) required for all formats. Internet for activation/updates.

Windows — Windows 10/11 (64-bit). Formats at launch: VST3. 64-bit DAW. 4 GB RAM (8 GB recommended). 200 MB disk. iLok account (USB dongle or host computer activation) required for all formats. Internet for activation/updates.

AAX (Pro Tools) — Planned a few weeks after launch. Pro Tools 2020+ on macOS/Windows, iLok account (USB dongle or host computer activation) required. Full details at AAX release.

Tested hosts — Logic Pro, Ableton Live, Cubase, Studio One, Reaper, FL Studio. Pro Tools support arrives with AAX build.

How do I pre-order Open Compressor?

Click the "Add to cart" button at the top or very bottom of this page. This will add Open Compressor to your cart. Click "Checkout Securely" then enter your payment details.

After your order, you will receive a confirmation email, then on October 2nd, 2025 you will get an email from Woodstock Audio with download and license details.