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I like using iTunes' equalizer, but that only works in iTunes.

I'm looking for some software that lets me apply a global, system-wide equalizer to Mac OS X.
The app (or pref pane, etc.) would let me change EQ settings and have that apply to all apps (iTunes, Spotify, Chrome, etc.).

Ideally the software would have some nice presets like iTunes does.

Free preferred, but I'm certainly willing to consider buying something.

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I'm curious, is there any particular reason why you want this? Are you looking to record or is it just for output? And are you looking to do this for certain applications, or all audio across the system? –  Kyle Cronin Oct 7 '11 at 23:27
@KyleCronin I'm using Spotify more than iTunes, and it doesn't have any kind of equalizer functionality. I also sometimes use things like Google Music (in-browser). Basically, I'd like to be able to apply an equalizer to apps that don't have one built in. And no, I'm not planning on recording; this is strictly for output/listening needs. Updated the question to address your last question (system wide, ideally). –  Nathan Greenstein Oct 7 '11 at 23:35

3 Answers 3

up vote 6 down vote accepted

Check out Boom, it's quite awesome.

Boom boosts the volume of your Mac at all levels. From boosting the volume of your music on iTunes, it boom the YouTube videos playing on your web browser. You can now boost the volume of any application playing sound or video like QuickTime, Podcasts, Skype, iChat, DVD Player, Garageband, iMovie and so on.

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Awesome app! I don't usually need the volume boost, but the equalizer is awesome! –  Nathan Greenstein Oct 8 '11 at 0:14
Now, we still need an answer for a free alternative... :-) –  gentmatt Nov 22 '11 at 16:26
Holiday Special in the Mac App store: 50% of till 2nd January! –  gentmatt Dec 16 '11 at 17:07

There's a free method using Soundflower and an Apple Developer Application called AU Lab (you'll need a free Apple Developer account get it, search for "AU Lab" after login).


  1. Install both programs
  2. Change your audio output to Soundflower in System Preferences
  3. Open AU Lab and pipe the Soundflower signal to your audio out.
  4. Apply an AUGraphicEQ filter in AU Lab
  5. Fiddle with levels to your heart's content.

This solution was taken from a blog post at dctrwatson.com/2011/06/os-x-system-equalizer, which I cannot link to due to insufficient reputation points. That page also contains better instructions and a startlingly informative comment thread.

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There is also Hear. It has an equalizer as well as bass boosting.

Hear greatly improves audio quality in movies and music throughout all of your Mac OS X applications. With Hear, music is richer, movie sound and dialog is clearer and games will blow you out of your chair!


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