Does Sound Check work over Airplay from iTunes?

[kirkmc]

I don't see why AirPlay should have any effect on Sound Check. I don't use it currently, but have in the past; I stream from my iMac to a Sonos Amp in my home office. If it's not working, then that's clearly a bug. 

[kirkmc]

How do you verify this? Do you have music where it's obvious when Sound Check kicks in? 

[kirkmc]

I tried, and, yes, it isn't apply Sound Check corrections. Playing a soft and loud track isn't necessary. If you select a track and press Command-I, then look at the File tab, you'll see the Sound Check correction in dB. So what I did was play a few tracks with Sound Check off, and I recorded them with Audio Hijack. I then played the same tracks with Sound Check on, and recorded them, and simply looked at the waveforms to see the difference.

 

So Airfoil is one option, and you might also want to check out Rogue Amoeba's Loopback, which should also allow you to do that. (I haven't tried it.) 

 

Since I never use Sound Check - it sometimes results in noticeable artifacts - I'd never noticed this before.