Tutorial: Most elegant way to run a high quality EQ on OS X
Jan 15, 2016 at 6:47 AM Thread Starter Post #1 of 12

zambz

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Hey guys, hope everyone is well.  I would like to guide you through the most elegant way I have found to run any quality parametric EQ on your audio output so that you may equalize your headphones for the optimal listening experience.
 
What Software You'll Need
 
Loopback: https://rogueamoeba.com/loopback/ - $75
AU Lab: http://www.apple.com/itunes/mastered-for-itunes/
TDR Nova EQ (AU plugin): http://www.tokyodawn.net/tdr-nova/
 
Of course, there are many choices for EQ plugins, but this parametric EQ by Tokyo Dawn Labs is absolutely awesome and also compensates the output volume based on your applied EQ to avoid distortion.  It's free and more powerful than most of us will need.  If you do wish to go further, check out offerings by DMG Audio and FabFilter or the gentleman's edition of Nova.
 
Please install each piece of software and proceed below.
 
Setting it all up
 
Open Loopback and create a virtual audio device, adding all input sources you want equalized to the device, leave all other options in their default state
 
e.g.
 

You may now exit Loopback.  You'll never need to use this again unless you wish to add more music players to your virtual output.
 
Now, open AU Lab, set "Audio Input Device" to your "Music Players" loopback output and set "Audio Output Device" to your audio interface:
 
e.g.
 

Now, simply insert Nova in the Effects slots in the Audio 1 channel, you may now go ahead and EQ sound to taste and also view an FFT by enabling the analyzer, use the BYPASS button to A/B with the EQ on and off:
 
e.g.
 

 
You may save your setups in AU Lab for various headphones and then simply open them from Finder when you wish to activate the EQ for that pair of headphones.
 
This particular approach (with included software) has many benefits to using Soundflower and certain other EQ plugins:
 
* The EQ output volume is compensated based on your implemented curve (great job TDR)
* Loopback will automatically mute the regular output when you open AU Lab, thus allowing the EQed version to come through, the advantage of this is that you may use OS X as normal with no EQ and easily enable EQ by opening your AU Lab project.  With Soundflower, once setup, your output will be muted completely until AU Lab is open, and so you'll need to keep switching audio devices if you wish to just listen to the output without opening AU Lab.
 
I think that Loopback is a bit pricey for what it does, but it is a very elegant solution to this problem.
 
Hope this helps someone out there :)
 
Jan 15, 2016 at 11:12 PM Post #2 of 12
Hey guys, I have actually found a nicer way to do this which actually costs less too.
 
Instead of using Loopback and AU Lab, you can actually purchase Audio Hijack instead (https://rogueamoeba.com/audiohijack/) for $49 which allows you to perform the same action.
 

 
Dec 28, 2016 at 5:13 AM Post #3 of 12
zambz, How do you set up Nova in Audio Hijack? Same process as with Loopback and AU Lab? I'd like to do something like this with my macbook pro, listening to music from itunes or another program like Audirvana using the headphone out.
 
Dec 28, 2016 at 5:18 AM Post #4 of 12
  zambz, How do you set up Nova in Audio Hijack? Same process as with Loopback and AU Lab?


Super easy.  Just install Audio Hijack and Nova, then you'll see it available under AUDIO UNIT EFFECTS and you can simply drag it into the signal chain.  Be sure to start the session to hear it in action.
 
Have fun!
zambz
 
Dec 28, 2016 at 1:52 PM Post #7 of 12
  Do you have to have Audio Hijack in record mode at all times for it to work just playing back audio files or movies?


It's not quite record mode even though the button looks like it, it's more of a session that's been started.
 
You can see the option under Control / Start Session
 
To actually record the output to a file, you must add a RECORDED device under OUTPUTS.  As long as you're using an OUTPUT DEVICE (i.e. your audio card / DAC), then it will only process the output in realtime and not write anything to a file.
 
Dec 28, 2016 at 4:35 PM Post #10 of 12
I have it all working in demo mode. Awesome! Just what I was looking for. Thank you very much zambz. I downloaded Nova also, and will be experimenting with both the AH EQ, and the Nova EQ.
 
Oct 11, 2017 at 12:43 AM Post #11 of 12
Thanks for the write up. If you are really desprate to save money, I found a free way to do this, but it's a bit finicky. At any rate, it's linked in my signature. Basically the same as the loop back method, but using free software in place of loopback.

Im inclined to try hijack as it might be overall easier.

I also will try Audicy too, as it supports plugins
http://www.audacityteam.org/home/
 
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