Video No Sound on YouTube, MySpace and Flash Video on Mac OS X

When watching web pages with embedded Flash video or animation such as movie or video clip on YouTube and MySpace using Mac OS X, users may hear no sound. The no sound audio output problem happens despite video playback is fine, and the issue can happen on any web browser, i.e. Safari and Mozilla Firefox. Strange thing is that, when using other applications such as RealPlayer, QuickTime Player and VLC Player, the sound is played properly. And no audio output issue does not affect embedded QuickTime including HD contents on the web.

Apple Mac OS X support site explains that the no audio from certain multimedia content issue is caused by some audio applications that change the computer’s audio settings to a sample rate that is too high for other applications to use. The notorious programs include certain versions of Real Player, VLC Player and Audacity.

The solution to solve the Internet movie no sound or audio output is to reset the audio setting in Mac OS X to original configuration:

  1. Open “Audio MIDI Setup” (/Applications/Utilities/), then check the “Audio Output” setting.
  2. Change the “Audio Output” setting to 44100.0 Hz.
  3. Quit Audio MIDI Setup.

If the Audio Output setting is grayed out or disabled, go to “Properties For” tab in Audio MIDI Setup, and select “Built in Output”.

IMPORTANT: The page is machine translated and provided "as is" without warranty. Machine translation may be difficult to understand. Please refer to original English article whenever possible.

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This entry was posted on Sunday, January 20th, 2008 at 6:12 pm and is filed under Audio & Video. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.

23 Responses to “Video No Sound on YouTube, MySpace and Flash Video on Mac OS X”

  1. liz
    December 14th, 2009 07:10
    23

    THANK YOU!

  2. sahoo
    October 10th, 2009 18:34
    22

    Flash No Sound WaveMapper Solution

    Launch Registry Editor by typing regedit at Run command.
    Navigate to the following registry key:
    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Drivers32

    On the right pane, and check for existance of “wavemapper” registry subkey, the mail culprit causing Flash no sound. If not found, create a new String value named “wavemapper”, and give the entry value “msacm32.drv”.
    If wavemapper entry is already existed, ensure that its value data is “msacm32.drv”.

  3. Steven Bannister
    May 10th, 2009 07:01
    21

    BRILLIANT! Thanks so much. Couldn’t find a solution anywhere else on the net to this problem.

  4. Jennifer
    April 18th, 2009 22:06
    20

    I was able to hear video on Youtube until yesterday. I checked all the MIDI settings and they are all as you suggested. Still no audio.
    Any other suggestions?
    Thanks.

  5. Tony Su
    March 28th, 2009 14:30
    19

    I tried all the tricks but still they didn’t solve the problem, until I saw someone talked about installing CCleaner to clean some cached files … So I installed CCleaner, and cleared all the files selected by default there, Boom! It worked! Youtube suddenly has sound!

  6. Mc
    February 25th, 2009 21:06
    18

    THANK YOU, at last soundinmy browser once again :-)

  7. digitalpunk
    February 25th, 2009 05:57
    17

    thanks

  8. digitalpunk
    February 25th, 2009 05:49
    16

    Excellent Lewis worked like a charm….could figure out how did you learn doing that?

  9. Alex
    January 9th, 2009 04:15
    15

    Thank you. Spot on. You saved this computer from a beating…..

  10. Convert FLV on Mac
    December 10th, 2008 11:44
    14

    THANK YOU THANK YOU THANK YOU !!!
    the ‘audio output’ change solved my web sound problem!

  11. Paul
    November 17th, 2008 01:08
    13

    Hi i have the same issue ..
    I am trying to follow “Start -> control panel-> Sound,speech audio devices -> Sound Manager-> digial audio – set to 44.1Khz”
    but I don’t find ‘Sound Manager’ under or ‘digital audio’ .. I checked this several times .. either this is not really present in my comp or I am looking at the wrong place.. Can someone give me a clue

  12. alexis
    October 6th, 2008 04:31
    12

    THANK YOU THANK YOU THANK YOU !!!
    the ‘audio output’ change solved my web sound problem!
    i’ve been looking for a simple answer like this for days now, and finally found it here. short, clear and to the point.

    a clue for other users: the application that must have changed my audio settings was a modular synthesizer demo version. it happened without any prior notice.

    @lexis

  13. manuel
    October 1st, 2008 03:12
    11

    una vez me paso pero reinicie la maquina y funciono un dia pense que volvio a suceder pero resulta que el volumen estaba en silencio

  14. nana
    September 28th, 2008 22:50
    10

    I had the similar issue where there was no sound when i use flash on the internet (both firefox and IE). But the computer sounds worked fine. Tried upgrading the IE and uninstalled and reinstalled flash. Nothing worked. Then read your forum.
    Solution: In windows XP, change the sound settings to 44.1KHZ. Start -> control panel-> Sound,speech audio devices -> Sound Manager-> digial audio – set to 44.1Khz.
    That worked. Thank you guys, by changing the setting to 44.1KH on windows got it working.

  15. Nate
    September 10th, 2008 01:02
    9

    Thanks so much, that worked great and I couldn’t find support for the issue anywhere else.

  16. Andres
    August 25th, 2008 12:54
    8

    GRACIAS!!!! DE VERDAD!!!

  17. LAR
    August 18th, 2008 13:21
    7

    La solución está en tus narices, es el control de volumen de la ventana de video, esta en mínimo, por más que subs el volumen de tu PC no vas a escuchar nada.
    He visto ya varias veces que las personas no ven ese control.

  18. Elifrit
    July 4th, 2008 14:44
    6

    Gracias a LEWIS, su solucion me ha funcionado de maravilla.

  19. neeeo
    June 17th, 2008 17:08
    5

    you beauty !
    even adobe dont have this standard fix on their initial website support page

    thanks
    neeeo : )

  20. LEWIS
    June 7th, 2008 11:41
    4

    AQUI LES TENGO LA SOLUCION PARA EL PROBLEMA DE NO TENER SONIDO EN YOUTUBE Y OTROS SITIOS AQUI LES VA ESPERO QUE LES SIRVA
    1. Click ‘Inicio’
    2. Click ‘Ejecutar’
    3. Tipear ‘regedit’
    4. Click ‘My Computer’
    5. Click ‘HKEY_LOCAL_MACHINE’
    6. Click ‘SOFTWARE’
    7. Click ‘Microsoft’
    8. Click ‘Windows NT’
    9. Click ‘CurrentVersion’
    10. Click derecho en el nodo ‘Drivers32′
    11. Click ‘nuevo’ y seleccione ‘valor alfanumérico’
    12. Escriba ‘wavemapper’ sin las comillas
    13. Click ‘Enter’
    14. Click derecho en ‘wavemapper’
    15. Click ‘Modificar’
    16. Escriba ‘msacm32.drv’
    17. Click ‘Enter’
    18. Click derecho en ‘Drivers32′
    19. Click ‘nuevo’ y seleccione ‘valor alfanumérico’
    20. Escriba ‘midimapper’
    21. Click ‘Enter’
    22. Click derecho en ‘midimapper’
    23. Click ‘Modificar’
    24. Escriba ‘midimap.dll’
    25. Click ‘OK’
    26. Cierre el editor del registro
    27. Disfrute sus videos con audio (No es necesario reiniciar)

  21. Cassie
    May 28th, 2008 09:16
    3

    Thanks, works like a charm!

  22. rog
    February 21st, 2008 23:02
    2

    still no joy for me (myspace in firefox on mac mini running mac os 10.4.11); animation but no sound. except once! i can’t make it work again though.

  23. Alejandra
    February 16th, 2008 10:57
    1

    thay you so much! this is exactly what I was looking for!

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