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How to get mono audio output in OSX on old macbook?



Announcing the arrival of Valued Associate #679: Cesar Manara
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I would like to output all system audio as mono in OSX.



Following this answer, I tried checking the "Play stereo audio as mono" option under the System Preferences > Accessibility tab, but it has no effect.



I have a 13-inch late 2008 Aluminum Macbook that I have upgraded to El Capitan 10.11.2. This Macbook model would have come bundled with Leopard, but apparently the mono audio feature was added in Snow Leopard.



So I suspect the problem might be that my old audio device doesn't support mono output, but post-Leopard OSX has an accessibility option because it is designed for newer machines that do support mono audio.



Can anyone confirm if this is true? If so, is there any other way to produce mono audio output on this old Macbook?










share|improve this question

























  • Yosemite has the same Accessibility option to play stereo as mono. What OS version did you upgrade from, and did it previously work?

    – user187561
    Feb 12 '16 at 17:07











  • When I got the machine it had Yosemite installed, but I never tested the mono audio feature until I upgraded. So I can't confirm whether it worked previously or not.

    – willpett
    Feb 12 '16 at 18:55











  • So what are your symptoms, how do you know 'it has no effect'? (wondering whether you have a problem with your headphone jack). Works on my late 2008 with Yosemite.

    – user187561
    Feb 12 '16 at 18:58













  • I created a test audio file with a constant tone in the left channel, and clicks in the right channel. After enabling the mono accessibility feature, I can still hear the tone only in my left ear, and the clicks only in my right ear. (specifically, I replicated the stereo/mono test from this post. My results for step 7 are the same as for step 5, indicating "no effect").

    – willpett
    Feb 12 '16 at 19:06











  • I downloaded Audacity, generated a left track of silence, a right track of clicks and listened. Left silent, right chirps. Ticked => Play Stereoaudio as mono, and got chirps both channels. (Used Sony MDR-V6 headsets, Late 2008 Aluminum Macbook, Yosemite 10.10.5). Not hardware specific (other than headphones - jack?)

    – user187561
    Feb 12 '16 at 19:35




















0















I would like to output all system audio as mono in OSX.



Following this answer, I tried checking the "Play stereo audio as mono" option under the System Preferences > Accessibility tab, but it has no effect.



I have a 13-inch late 2008 Aluminum Macbook that I have upgraded to El Capitan 10.11.2. This Macbook model would have come bundled with Leopard, but apparently the mono audio feature was added in Snow Leopard.



So I suspect the problem might be that my old audio device doesn't support mono output, but post-Leopard OSX has an accessibility option because it is designed for newer machines that do support mono audio.



Can anyone confirm if this is true? If so, is there any other way to produce mono audio output on this old Macbook?










share|improve this question

























  • Yosemite has the same Accessibility option to play stereo as mono. What OS version did you upgrade from, and did it previously work?

    – user187561
    Feb 12 '16 at 17:07











  • When I got the machine it had Yosemite installed, but I never tested the mono audio feature until I upgraded. So I can't confirm whether it worked previously or not.

    – willpett
    Feb 12 '16 at 18:55











  • So what are your symptoms, how do you know 'it has no effect'? (wondering whether you have a problem with your headphone jack). Works on my late 2008 with Yosemite.

    – user187561
    Feb 12 '16 at 18:58













  • I created a test audio file with a constant tone in the left channel, and clicks in the right channel. After enabling the mono accessibility feature, I can still hear the tone only in my left ear, and the clicks only in my right ear. (specifically, I replicated the stereo/mono test from this post. My results for step 7 are the same as for step 5, indicating "no effect").

    – willpett
    Feb 12 '16 at 19:06











  • I downloaded Audacity, generated a left track of silence, a right track of clicks and listened. Left silent, right chirps. Ticked => Play Stereoaudio as mono, and got chirps both channels. (Used Sony MDR-V6 headsets, Late 2008 Aluminum Macbook, Yosemite 10.10.5). Not hardware specific (other than headphones - jack?)

    – user187561
    Feb 12 '16 at 19:35
















0












0








0








I would like to output all system audio as mono in OSX.



Following this answer, I tried checking the "Play stereo audio as mono" option under the System Preferences > Accessibility tab, but it has no effect.



I have a 13-inch late 2008 Aluminum Macbook that I have upgraded to El Capitan 10.11.2. This Macbook model would have come bundled with Leopard, but apparently the mono audio feature was added in Snow Leopard.



So I suspect the problem might be that my old audio device doesn't support mono output, but post-Leopard OSX has an accessibility option because it is designed for newer machines that do support mono audio.



Can anyone confirm if this is true? If so, is there any other way to produce mono audio output on this old Macbook?










share|improve this question
















I would like to output all system audio as mono in OSX.



Following this answer, I tried checking the "Play stereo audio as mono" option under the System Preferences > Accessibility tab, but it has no effect.



I have a 13-inch late 2008 Aluminum Macbook that I have upgraded to El Capitan 10.11.2. This Macbook model would have come bundled with Leopard, but apparently the mono audio feature was added in Snow Leopard.



So I suspect the problem might be that my old audio device doesn't support mono output, but post-Leopard OSX has an accessibility option because it is designed for newer machines that do support mono audio.



Can anyone confirm if this is true? If so, is there any other way to produce mono audio output on this old Macbook?







macos audio conversion stereo mono






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited Mar 20 '17 at 10:17









Community

1




1










asked Feb 12 '16 at 13:54









willpettwillpett

11




11













  • Yosemite has the same Accessibility option to play stereo as mono. What OS version did you upgrade from, and did it previously work?

    – user187561
    Feb 12 '16 at 17:07











  • When I got the machine it had Yosemite installed, but I never tested the mono audio feature until I upgraded. So I can't confirm whether it worked previously or not.

    – willpett
    Feb 12 '16 at 18:55











  • So what are your symptoms, how do you know 'it has no effect'? (wondering whether you have a problem with your headphone jack). Works on my late 2008 with Yosemite.

    – user187561
    Feb 12 '16 at 18:58













  • I created a test audio file with a constant tone in the left channel, and clicks in the right channel. After enabling the mono accessibility feature, I can still hear the tone only in my left ear, and the clicks only in my right ear. (specifically, I replicated the stereo/mono test from this post. My results for step 7 are the same as for step 5, indicating "no effect").

    – willpett
    Feb 12 '16 at 19:06











  • I downloaded Audacity, generated a left track of silence, a right track of clicks and listened. Left silent, right chirps. Ticked => Play Stereoaudio as mono, and got chirps both channels. (Used Sony MDR-V6 headsets, Late 2008 Aluminum Macbook, Yosemite 10.10.5). Not hardware specific (other than headphones - jack?)

    – user187561
    Feb 12 '16 at 19:35





















  • Yosemite has the same Accessibility option to play stereo as mono. What OS version did you upgrade from, and did it previously work?

    – user187561
    Feb 12 '16 at 17:07











  • When I got the machine it had Yosemite installed, but I never tested the mono audio feature until I upgraded. So I can't confirm whether it worked previously or not.

    – willpett
    Feb 12 '16 at 18:55











  • So what are your symptoms, how do you know 'it has no effect'? (wondering whether you have a problem with your headphone jack). Works on my late 2008 with Yosemite.

    – user187561
    Feb 12 '16 at 18:58













  • I created a test audio file with a constant tone in the left channel, and clicks in the right channel. After enabling the mono accessibility feature, I can still hear the tone only in my left ear, and the clicks only in my right ear. (specifically, I replicated the stereo/mono test from this post. My results for step 7 are the same as for step 5, indicating "no effect").

    – willpett
    Feb 12 '16 at 19:06











  • I downloaded Audacity, generated a left track of silence, a right track of clicks and listened. Left silent, right chirps. Ticked => Play Stereoaudio as mono, and got chirps both channels. (Used Sony MDR-V6 headsets, Late 2008 Aluminum Macbook, Yosemite 10.10.5). Not hardware specific (other than headphones - jack?)

    – user187561
    Feb 12 '16 at 19:35



















Yosemite has the same Accessibility option to play stereo as mono. What OS version did you upgrade from, and did it previously work?

– user187561
Feb 12 '16 at 17:07





Yosemite has the same Accessibility option to play stereo as mono. What OS version did you upgrade from, and did it previously work?

– user187561
Feb 12 '16 at 17:07













When I got the machine it had Yosemite installed, but I never tested the mono audio feature until I upgraded. So I can't confirm whether it worked previously or not.

– willpett
Feb 12 '16 at 18:55





When I got the machine it had Yosemite installed, but I never tested the mono audio feature until I upgraded. So I can't confirm whether it worked previously or not.

– willpett
Feb 12 '16 at 18:55













So what are your symptoms, how do you know 'it has no effect'? (wondering whether you have a problem with your headphone jack). Works on my late 2008 with Yosemite.

– user187561
Feb 12 '16 at 18:58







So what are your symptoms, how do you know 'it has no effect'? (wondering whether you have a problem with your headphone jack). Works on my late 2008 with Yosemite.

– user187561
Feb 12 '16 at 18:58















I created a test audio file with a constant tone in the left channel, and clicks in the right channel. After enabling the mono accessibility feature, I can still hear the tone only in my left ear, and the clicks only in my right ear. (specifically, I replicated the stereo/mono test from this post. My results for step 7 are the same as for step 5, indicating "no effect").

– willpett
Feb 12 '16 at 19:06





I created a test audio file with a constant tone in the left channel, and clicks in the right channel. After enabling the mono accessibility feature, I can still hear the tone only in my left ear, and the clicks only in my right ear. (specifically, I replicated the stereo/mono test from this post. My results for step 7 are the same as for step 5, indicating "no effect").

– willpett
Feb 12 '16 at 19:06













I downloaded Audacity, generated a left track of silence, a right track of clicks and listened. Left silent, right chirps. Ticked => Play Stereoaudio as mono, and got chirps both channels. (Used Sony MDR-V6 headsets, Late 2008 Aluminum Macbook, Yosemite 10.10.5). Not hardware specific (other than headphones - jack?)

– user187561
Feb 12 '16 at 19:35







I downloaded Audacity, generated a left track of silence, a right track of clicks and listened. Left silent, right chirps. Ticked => Play Stereoaudio as mono, and got chirps both channels. (Used Sony MDR-V6 headsets, Late 2008 Aluminum Macbook, Yosemite 10.10.5). Not hardware specific (other than headphones - jack?)

– user187561
Feb 12 '16 at 19:35












2 Answers
2






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oldest

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0














Try to go to the Universal Access or "Accessibility" system preferences. In the audio section you will have an option to play stereo audio as mono. You need to check this box, and your audio will be played as mono.






share|improve this answer
























  • As stated in the question, I already tried this and it doesn't work.

    – willpett
    Feb 12 '16 at 15:01



















0














Was having this same problem and got it to work by checking the box on, then restarting my computer and reconnecting to the bluetooth speaker I was using.



Hopefully you've figured this out in the last 3 years but maybe it'll help somebody in the future.






share|improve this answer








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Adam is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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    2 Answers
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    2 Answers
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    Try to go to the Universal Access or "Accessibility" system preferences. In the audio section you will have an option to play stereo audio as mono. You need to check this box, and your audio will be played as mono.






    share|improve this answer
























    • As stated in the question, I already tried this and it doesn't work.

      – willpett
      Feb 12 '16 at 15:01
















    0














    Try to go to the Universal Access or "Accessibility" system preferences. In the audio section you will have an option to play stereo audio as mono. You need to check this box, and your audio will be played as mono.






    share|improve this answer
























    • As stated in the question, I already tried this and it doesn't work.

      – willpett
      Feb 12 '16 at 15:01














    0












    0








    0







    Try to go to the Universal Access or "Accessibility" system preferences. In the audio section you will have an option to play stereo audio as mono. You need to check this box, and your audio will be played as mono.






    share|improve this answer













    Try to go to the Universal Access or "Accessibility" system preferences. In the audio section you will have an option to play stereo audio as mono. You need to check this box, and your audio will be played as mono.







    share|improve this answer












    share|improve this answer



    share|improve this answer










    answered Feb 12 '16 at 14:10









    Tim StuartTim Stuart

    11




    11













    • As stated in the question, I already tried this and it doesn't work.

      – willpett
      Feb 12 '16 at 15:01



















    • As stated in the question, I already tried this and it doesn't work.

      – willpett
      Feb 12 '16 at 15:01

















    As stated in the question, I already tried this and it doesn't work.

    – willpett
    Feb 12 '16 at 15:01





    As stated in the question, I already tried this and it doesn't work.

    – willpett
    Feb 12 '16 at 15:01













    0














    Was having this same problem and got it to work by checking the box on, then restarting my computer and reconnecting to the bluetooth speaker I was using.



    Hopefully you've figured this out in the last 3 years but maybe it'll help somebody in the future.






    share|improve this answer








    New contributor




    Adam is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
    Check out our Code of Conduct.

























      0














      Was having this same problem and got it to work by checking the box on, then restarting my computer and reconnecting to the bluetooth speaker I was using.



      Hopefully you've figured this out in the last 3 years but maybe it'll help somebody in the future.






      share|improve this answer








      New contributor




      Adam is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.























        0












        0








        0







        Was having this same problem and got it to work by checking the box on, then restarting my computer and reconnecting to the bluetooth speaker I was using.



        Hopefully you've figured this out in the last 3 years but maybe it'll help somebody in the future.






        share|improve this answer








        New contributor




        Adam is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
        Check out our Code of Conduct.










        Was having this same problem and got it to work by checking the box on, then restarting my computer and reconnecting to the bluetooth speaker I was using.



        Hopefully you've figured this out in the last 3 years but maybe it'll help somebody in the future.







        share|improve this answer








        New contributor




        Adam is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
        Check out our Code of Conduct.









        share|improve this answer



        share|improve this answer






        New contributor




        Adam is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
        Check out our Code of Conduct.









        answered 6 hours ago









        AdamAdam

        1




        1




        New contributor




        Adam is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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        Adam is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
        Check out our Code of Conduct.






        Adam is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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