M4L envelope follower with advanced features




Rated 4.67 out of 5 based on 3 customer ratings
(3 customer reviews)


Made with gen~

gen~ powered: sample by sample accuracy guaranteed!

Powerful editing tools

Lot of options to meticulously shape your sound source

Modulate any parameter

Link REF's modulation to any parameter inside Ableton Live


REF allows you to modulate anything you want in Ableton Live: other devices, the user interface, and third party plug-ins, using sound as source.

You can shape the incoming audio source with the low/high pass filter, listening the source in peak or rms modes, then design the envelope exactly how you need it, using tools as relative/absolute modes, linear/logarithmic modulation, and positive/negative directions. You can even work on your envelopes with standard EG parameters as attack, hold, release, and a global delay time.

REF uses a big display to give you an accurate visual feedback: it will help you to check the incoming audio signal, set the threshold level, and view the real envelope generated, which will control the chosen target parameter.

REF is a great tool for any kind of modulation: kick/bass side-chain combinations, driving filters, and experimental uses asking for controlling parameters from an audio source.

Developed on the Max 6 engine, taking advantage of gen~, REF supports both 32 and 64 bit mode.

REF is developed using exclusively standard Max objects, to guarantee compatibility with latest Live and Max For Live versions.

“The most flexible envelope follower around, and for this range of price is definitely a good option to expand the sonic possibilities.”

Francisco Velazquez

Professor of Synthesis at BAN Electronic Music Center


MODULATORS: take them all, and save money!

REF is part of Modulators by K-Devices pack, available on Ableton Packs Shop.
This pack includes EXT3, TED fx, REF and TIP.

It’s just 39€, instead of 50€ (price for all four devices on our shop)!



3 reviews for REF

  1. Rated 4 out of 5 (verified owner)

    REF is awesome!!!!! one of the tools i’ll use the most! it gives so many possibilities!! thanks a lot for having created it!
    if you are interested check out my new remix

  2. Rated 5 out of 5

    Pete Horam

    Oh No I missed it by an hour! :(

  3. Rated 5 out of 5

    Aaron Zilch (verified owner)

    Probably my favorite M4L device. I use this on nearly every track. Beautiful “musical” sounding modulations, and the clear GUI really helps you navigate the plentiful options to dial it in to the type of motion you want.

    -Aaron Zilch
    Ableton Certified Trainer

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  • Ableton Live 9.6 or higher
  • Max For Live (Max 7.2 or higher)
  • OsX and Windows compatible


Released on August 24th 2017

  • Improved resolution for modulator signal
  • Minor bugs fixed


Released on May 23th 2016

  • Fixed an bug that may cause Live freezes when a parameter is edited via mouse


Released on March 10th 2016

  • New UI
  • Reduced latency
  • Improved “envelope follower” engine

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