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Audio Media Gear of the Year 2014
Sound on Sound award nominee
Perception screenshot

Ian Shepherd's Perception $149

Eliminate "loudness deception."

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How Does it Work?

See Perception in action.

Better? Or Just Louder?

How can you be sure?

Loudness dial

Loudness changes our perception of music. As a mastering engineer, you must constantly ask yourself, "Is this really better? Or just louder?" Making accurate, impartial judgements about this has always been a key skill of the mastering engineer, which can take years to learn. Until now...

Sound On Sound Magazine logo
Perception is recommended without reservation, for anyone involved in mastering, at any level. Hugh Robjohns (Sound On Sound Magazine)

Loudness Deception

Make informed decisions about your music.

Fletcher-Munson curves

Perception allows you to hear through “loudness deception” and make truly impartial, accurate decisions about the best possible sound for your music - quickly and easily. You can instantly bypass entire FX chains to make A/B comparisons of EQ settings, compression and more. Even better, Perception will level-match and sync your sources so that "loudness deception" and plugin delay do not influence your decisions.

MusicTech Magazine Excellence Award
Since adding Perception to our plug-in library, we've become almost addicted to it. Mike Hillier (MusicTech Magazine)

Level-Matched A/B Testing

How does it work?

Simple. First, insert the Perception Source plugin before the FX chain you want to A/B test. Second, insert the Perception Controller plugin after the FX chain. Now you can toggle Perception’s Bypass FX button to compare your music with and without the FX chain. Then press Balance and Sync to level-match and sync the sources.

Compare Your Music

Does it stack up against the best?

Now you can hear how your music compares to that song you've been hearing on the radio. How do the loudness levels compare? Do they have the same dynamic range? What happens if you add some compression? Mastering is iterative - tweak, compare and tweak some more. Perception speeds up the process so that you can quickly nail down the sound you're going for.


What's the word on the street?

The time saved easily justifies the price. It's so good you'll be asking yourself why nobody came up with the idea before. I just wish I had this in my toolbox long ago! Bill Lacey (Resolution Magazine)
Every now and again a plugin comes along that makes you think 'How did I work without this?' - Perception is such a plugin... even as an experienced engineer, Perception helped my workflow massively. Alan Branch (Audio Media International)
The phrase 'game changer' is flung about too often these days... [Perception is] as near as you'll get these days. Recording Review.com
I think Perception will prove to be the most important plugin to be released this year. In fact, provided enough people get to use it, I can imagine it making a greater contribution to the sound of contemporary music than any plugin released this decade. Nick Watson (Fluid Mastering)
Perception has completely changed my workflow for mastering and will do the same for you; I'm certain of that. Chris Pavey (Pro Audio Web Blog)
You don't realise how good it is until you've got it. Neil Hester (Pro Tools Expert)


  • Bypass entire FX chains
  • Fast A/B testing
  • Loudness matching
  • Plugin delay compensation
  • Peak to loudness ratio display
  • Dynamic range tweaking
  • Snapshots


AAX logo Audio Units logo VST logo
  • Mac OS 10.7 or later (64-bit)
  • Windows XP SP3 or later (32/64-bit)

  • Available for immediate download
  • Pay with credit card or PayPal
  • 60 day money-back guarantee
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