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Level 1

10 points

Aggregated device with AirPlay @ Mountain Lion

My current setup:

living room: AirPort Express connected to receiver
bedroom: Macbook Pro (late 2009) with Mountain Lion in combination with Spotify and/or iTunes

I would like to have the sound of spotify/itunes be sent simultaneously to and the optical out of my macbook and the airport express in the living. So I created an aggregated device using this support file: http://support.apple.com/kb/HT3956# - I ticked the box on both AirPlay and Built-in Output but there is no sound getting transfered to the Airport Express when both are ticked together.

If I only tick the Airplay checkbox it works perfectly in the living room and if I only tick the Built-in Ouput in it works perfectly on the macbook. But not both checkboxes combined.

Screenshots for clarification to be found here: http://imgur.com/a/K0KND#0

screenshot 1) works as intended: sound on airport express via AirPlay
screenshot 2) does not work as intended: only sound on macbook pro
screenshot 3) works as intended: sound on macbook pro via Built-in output

So any clue why the setup from screenshot 2 does not work?

I reckon this has to be a bug. Can anyone else reproduce this?

MBP 15" 2.8GHZ 7200RPM 500GB, Mac OS X (10.5.7)

Posted on Jul 29, 2012 10:38 AM

16 replies

kbooms1w

Level 1

14 points

Jun 11, 2014 4:58 PM in response to AkuKnives

Using Mulit-output device in the Audio MIDI Setup utility produces terrible quality sound, with low volume, static in the "secondary" output, and a huge delay if you are watching a video.

I really don't get what is so difficult about this for Apple, as I posted initially, this works fine from within iTunes, I can simultaneously output sound via speakers plugged in directly to my Macbook, and Airplay speakers via my Airport, with no real perceptible delay/difference between the direct and Airplay speakers.

Don't understand why this isn't possible via the OS / Audio MIDI Setup utility, so that third party software can do the same thing, have to assume that Apple simply doesn't want to address this.

Aggregated device with AirPlay @ Mountain Lion