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Flatline 2

Clipping and limiting
for the master bus.

Clip, Limit, and intelligent Hybrid, in one mix-bus plugin.

$139.00 USD
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Used by professional mastering engineersTony Lindgren, Thomas 'Plec' Johansson, Ermin Hamidovic

    Features

    Set the threshold and output ceiling.

    Choose Clip, Limit, or Hybrid, then adjust how hard the signal is processed and where the output peaks.

    Flatline 2 interface

    Mode

    Select Clip, Limit, or Hybrid mode.

    Threshold

    Sets the level where gain reduction starts.

    Shape

    Sets the flavour of how Flatline 2 reacts.

    Ceiling

    Sets the level of the output.

    Delta

    Hear what Flatline 2 is doing.

    Auto gain

    When enabled, lowering the threshold will automatically push the level up to the ceiling.

    Oversampling

    Up to 64x oversampling.

    DC offset

    Removes DC offset if present.

    Dither

    Applies dither to the output signal to reduce quantization error.

    Hybrid controls

    Adjust the transient and sustain processing in Hybrid mode.

    LUFS display

    Shows LUFS across 3 timespans, dynamic range, and a target level meter.

    01

    Original Flatline curve

    Clip

    The original Flatline 1 soft-clipping algorithm.

    02

    Classic brickwall ceiling

    Limit

    A 1990s-style brickwall limiter for output level and transient control.

    03

    Clipper and limiter together

    Hybrid

    Clips transients and limits the sustained part of the signal.

    Compatibility

    System Requirements

    macOS

    Activation
    iLok License Manager (free)
    OS
    macOS 10.13 or later
    CPU
    Intel or Apple Silicon
    Formats
    VST3 · AU · AAX

    Windows

    Activation
    iLok License Manager (free)
    OS
    Windows 10 or later
    CPU
    Intel i5 or equivalent
    Formats
    VST3 · AAX

    Requires a 64-bit system and internet for download and activation. An iLok dongle is optional because you can activate directly to your computer.

    iLok licensing
    VST3 plugin format
    Audio Units plugin format
    AAX plugin format

    Compatible DAWs

    Any modern DAW supporting VST3, AAX, or AU. iLok License Manager →

    Support

    Frequently asked questions

    What happens after I purchase?

    After purchase, we email your download link and serial number. Run the plugin installer, then redeem the serial number in the free iLok License Manager to activate Flatline 2.

    Do I need an iLok USB dongle?

    No. The iLok dongle is optional. You can activate Flatline 2 directly to your computer using the free iLok License Manager app. A dongle is only required if you want to move the license between machines without re-activating.

    How many activations do I get?

    You can activate Flatline 2 in two iLok locations, such as a studio computer and a laptop.

    How do I install Flatline 2?

    Use the download link in your order confirmation email to grab the installer. Run it, make sure you have the free iLok License Manager installed, and activate using your serial number.

    Is there a trial version?

    Yes. Select "Try free for 7 days" near the top of the page for a free seven-day trial.

    How is this different from Flatline 1?

    Flatline 2's Clip mode preserves the Flatline 1 algorithm. It also adds Limit and Hybrid modes, envelope shaping, 64x oversampling, LUFS metering, channel linking, delta monitoring, DC offset removal, and dithering.

    Can I use Flatline 2 anywhere in the chain?

    Yes. While it's purpose-built for the master bus, Flatline 2 works just as well across drum buses, vocal buses, or anywhere you'd reach for clipping or limiting.

    How do I get help?

    Contact our support team.

    Artist reviews

    What producers say.

    Mick Gordon

    Flatline 2 is outstanding - Hybrid mode is super impressive, combining the best of clipping and limiting to create masters that are clean, punchy, and crystal clear. With precise envelope control, lookahead, and LUFS metering, it's an essential tool for both mastering and track clipping/limiting.

    Mick GordonDOOM, DOOM: Eternal, Prey
    Tony Lindgren

    Flatline has been my go-to clipping plugin ever since its first iteration. With its ease of use and great sounding, well thought-out soft clipping curve, it's no wonder it ended up on several projects I've mastered in the past few years. With Flatline 2, the team at SubMission Audio has taken everything even further with a beautiful new UI and, most importantly, the addition of the Hybrid mode, which turned this plugin into a versatile powerhouse and a must-have in any mastering engineer's tool box.

    Tony LindgrenDimmu Borgir · Opeth · Billie Eilish · BTBAM
    Thomas 'Plec' Johansson

    First rule in mastering is to do no harm, and after I've used basically every limiting/clipping piece of software and hardware directed at mastering applications available on the planet, the best sounding pieces tend to be the ones that do as little harm as possible while giving you the loudness that you're after and this is not a simple feat. Flatline has been the only piece of software that on several occasions proved to work better than my favorite $10,000 hardware box for these applications. It's simply the best solution available today for gaining level in a clean and musical way!

    Thomas 'Plec' JohanssonSoilwork, Scar Symmetry

    Customer reviews

    What customers say.

    Verified by Judge.me

    Customer Reviews

    Based on 206 reviews
    95%
    (196)
    4%
    (8)
    0%
    (1)
    0%
    (1)
    0%
    (0)
    J
    Josh C.
    The Best

    I couldn't imagine using any other product for the many things it does.

    t
    tamir r.
    GREAT CLIPPER&LIMITER

    Such an amazing plugin !!!!

    J
    Jeff A.
    Mastering like a pro

    Flatline 2 added that little spark that I was missing on my master. It has great presets and very user friendly.

    N
    Neal H.
    Best limiter on the market

    I’d seen flatline been used on mix tutorials many times in the past and was always curious about it.

    After using multiple other limiters, both stock and purchased, I decided to give Flatline a shot.

    I do not regret my purchase at all.

    Flatline give’s my mixes a nice transparent lift, the UI is prefect and clutter free.

    All in all I would 10% recommend this plugin to anyone looking for a good, solid limiter/clipper

    R
    Rob L.
    Flatline 2 is great!!

    I have mostly all the limiters/maximizers etc that are availlable but Flatline was realy a revelation to me! I don't know what's going down under the hood of this plugin but fact is to me it does the best job at the end of my mix/masterbus.

    G
    Ghaeis O.

    Flatline 2

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