Chosse
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Q: How to use airplay speakers in multi-output device without crackling audio?

Hi,

 

I would like to mirror the audio output from my mac mini to the built-in output and an airplay speaker.

 

Therefore I added a Multi-Output Device containing  the Built-in- and Airplay output, as soon as I activate the airplay speaker the sound is mirrored but unfortunately always with a crackling sound coming of the speakers set as "slave Device"... only the Device set as "Master Device" has clear sound, doesn't matter if it's the airplay speaker or the speaker (or headphone) directly connected to the built-in output.

 

I've tested this with a mac mini and an mac book air as audio source, same problem. Both were running Mac OS V. 10.9.2.

 

Does anyone have an idea what I'm doing wrong?

 

Greets

 

Chris

Posted on Mar 25, 2014 3:15 PM

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Chosse

Q: How to use airplay speakers in multi-output device without crackling audio?

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  • by LiukTH,

    LiukTH LiukTH Aug 4, 2015 7:39 PM in response to joealittle
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    Aug 4, 2015 7:39 PM in response to joealittle

    I have this problem too, tried to select quad output but cannot manage it

  • by reckxl,

    reckxl reckxl Aug 25, 2015 8:33 PM in response to Chosse
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    Aug 25, 2015 8:33 PM in response to Chosse

    Ok I figured a fix... its not in doing the quad thing but make an aggregated device - select configure speaker and then multichannel  - Then Stream 1 and Stream 2 - Left front to 3 - Right front to 2. You should be able to figure what you want from there just make sure to keep it on stereo and not Quadraphonic.

  • by webby37,

    webby37 webby37 Aug 30, 2015 1:58 PM in response to reckxl
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    Aug 30, 2015 1:58 PM in response to reckxl

    By golly, I... I think it worked. Holy frack. Kudos!

  • by whoiswillwilliams,

    whoiswillwilliams whoiswillwilliams Sep 18, 2015 7:18 PM in response to reckxl
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    Sep 18, 2015 7:18 PM in response to reckxl

    Thankyou - this worked!!!!

  • by TreesaRose,

    TreesaRose TreesaRose Sep 26, 2015 12:41 PM in response to reckxl
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    Sep 26, 2015 12:41 PM in response to reckxl

    This helped but now I don't have control over the volume on my Mac or the speakers.  Does anyone know how to fix that?

  • by mister_jared,

    mister_jared mister_jared Feb 14, 2016 7:19 PM in response to reckxl
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    Feb 14, 2016 7:19 PM in response to reckxl

    Guys, I think I've found the fix if you're *just* trying to get multi-output working on a single set of stereo speakers (e.g. the built-in ones) without crackle/distortion. It's just the "Drift Correction" checkbox -- UNCHECK that sumbitch! It may as well be labeled "Add Crackle".


    Also, actually don't use "Aggregated Device" -- use "Multi-output Device" instead: then [with Multi-out] you get both L & R channels and no "Speaker Configuration" is necessary.


    I think the reason the "Aggregated Device" route doesn't work is because it seems it doesn't combine two streams into one. So it's like "hey I've got 4 streams to output (L&R x 2 sources), but only 2 slots" -- that would explain why most of us had the "only getting output to 1 device" problem. It's [presumably] because the L&R output for device 2 is going to channels 3 and 4 which we don't have. This would *also* explain why the "left front to 3, right front to 2" seems to work: then Device 2 receives the Left channel of our output while Device 1 receives the Right.


    When I tried this "aggregate - stereo" method myself, I noticed that while my recorded audio was no longer distorted (because I had unchecked that vile, godforsaken box), I was only hearing it on the Left channel. After dumping the Aggregate Device and setting up a new Multi-Output Device again, I then did finally at long last have non-crackling audio going to *both* devices and *both* L&R channels. Whew.


    Also, googling "Drift Correction crackle" seems to show this is a very common problem, and that unchecking it was all that was needed.

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