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Adobe Flash Player 11.3  -  Bug 3289908

Created on Tuesday, July 17, 2012

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[Platform_Windows]Bug with surround sound


Problem Description:
If you have a surround sound setup the sound will be forced through all speakers even if the source is not surround, it will also be alot louder.

Steps to Reproduce:
Play sound that is not surround sound on a surround sound setup.

Actual Result:
The audio will be forced to play through all speakers.
Expected Result:
That the sound is only played on the front speakers and the bass.

Any Workarounds:
Downgrade to 11.2

Test Configuration

App Language(s) Swedish
OS Language(s) Swedish
Platform(s) Windows 7 SP1 64-bit
Browser(s) Browsers All

Notes (21)

  • DarkUltra

    8:49:24 AM GMT+00:00 Sep 13, 2013

    So THIS was why my audio suddenly sounded like crap in youtube videos. If I switch to the HTML5 test version of youtube, everything is fine again.

    Really Adobe, if I want my stereo content mixed up to 5.1 or 7.1 I will do it myself in either my soundcard settings, or mostly preferred in my receiver.

    Another workaround than the HTML5, is to download and install Smooth Video Project and its companion app SVPtube. Then you can just copy the youtube url and it automatically opens Media Player Classic and plays the clip at max resolution available.

  • Squall_Leonhart69r

    5:54:58 AM GMT+00:00 Sep 8, 2013

    I've found a workaround, other then the dll provided below

    if you open a video and then reduce the windows sample rate to 44khz, suddenly the sound is 2 channel again instead of stereo fill 5.1

  • Squall_Leonhart69r

    5:53:36 AM GMT+00:00 Sep 8, 2013

    whoever marked this as by design needs to be stripped bare and whipped to within an inch of their life.

  • Gazer75

    12:33:55 AM GMT+00:00 Mar 22, 2013

    This is not just a flash problem. Programs developed in Air also have same problem. A good example of this is the streaming software used by WiMP

  • edechamps

    5:50:33 PM GMT+00:00 Mar 17, 2013

    Because of this behavior, your software does not comply with current surround sound specifications, namely ITU-R BS.775:

    Page 12: "When a stereophonic programme is to be presented over a reproduction system with three frontal loudspeakers, the left and right signals of the stereo programme should be presented respectively over the left and right loudspeakers only.

    When there is no surround signal in a programme, surround loudspeakers should not be activated."

  • edechamps

    12:29:33 PM GMT+00:00 Mar 16, 2013

    Seeing that Adobe is clearly not willing to fix what clearly is a bug (since Flash is the only software that behaves that way and it is a gratuitous alteration of the original audio stream), I developed a workaround:

    Just copy the provided DLL (audioses.dll) into your Flash player directory (typically C:\Windows\SysWOW64\Macromed\Flash on 64-bit Windows) to get rid of the issue. See README.txt for details. See sbs.cpp for how it's actually implemented.

  • Jeromie Clark

    6:47:17 PM GMT+00:00 Nov 19, 2012

    Flash Player has changed from using the old Windows WavAudio subsystem to the modern CoreAudio APIs. Microsoft's CoreAudio subsystem asks Flash Player for stereo or surround sound based on the sound card configuration. When CoreAudio asks for surround-sound, the Flash Player's stereo audio is filled to all speakers. If CoreAudio asks for stereo, then the audio from Flash Player is passed as stereo.

    This behavior is controlled through the Windows Audio properties in the Control Panel, or through your sound card manager preferences.

  • jonaszx

    10:27:56 AM GMT+00:00 Nov 9, 2012

    @Squall_Leaonhart69r Are you using a USB soundcard?

  • Squall_Leonhart69r

    2:26:01 PM GMT+00:00 Nov 7, 2012

    "No the problem seems to be limited to usb surround headsets and the problem seems gone in the latest flash version chrome comes with but are still present in the latest version from adobe"

    Nope, it affects soundcards as well.

    forcing windows back to 2 channels before starting the browser and switching back to 5.1 afterwards seems to help.

  • sndwv

    3:58:23 PM GMT+00:00 Oct 29, 2012

    @MrX1980: my speakers are connected via optical. When using SPDIF as output device volume/channels are fine, not so when using Speakers. (for specs, see below)

  • jonaszx

    5:37:07 PM GMT+00:00 Oct 28, 2012

    No the problem seems to be limited to usb surround headsets and the problem seems gone in the latest flash version chrome comes with but are still present in the latest version from adobe

  • Squall_Leonhart69r

    2:00:16 PM GMT+00:00 Oct 28, 2012

    the upmixing appears fixed in 11.4.402.287

    and i can also now use CMSS3D again on flash video's.

  • Dirk Finken

    10:34:12 AM GMT+00:00 Oct 28, 2012

    Hello, I don't have such problems with my JayTech 5.1 sound system with 3x 3.5 mm phone connector (analog output).

    - Realtek ALC1200 (MCP72) / ASUS M4N82 Deluxe
    - Realtek HD audio-driver R2.70
    - Windows 7 Ultimate x64 SP1
    - IE9, Firefox release/beta/aurora/nightly, Chrome Canary, Opera Next

    Realtek HD Audio Manager settings:

    - Are you using all digital output (S/PDIF) or analog ?
    - Your Hardware details and driver version ?
    - Your sound settings ?

  • jonaszx

    12:04:32 PM GMT+00:00 Oct 5, 2012

    Please people who come here for the problem with the sound going to max all the time, this is not about that. This is about a bug with surround sound not about flash not remembering the volume setting.

  • Squall_Leonhart69r

    11:58:05 PM GMT+00:00 Oct 4, 2012

    Adobe doesn't do QA anymore, they can't find qualified staff to do it.

  • jonaszx

    12:36:21 PM GMT+00:00 Sep 20, 2012

    No the issue is not fixed in 11.4

  • Zhe Wang

    12:18:48 AM GMT+00:00 Sep 18, 2012

    We have awared such issue in FP 11.3, can you please try 11.4 to see if the issue still there?

  • Squall_Leonhart69r

    5:01:26 PM GMT+00:00 Sep 12, 2012

    i also have the audio "Expansion" issue, i can't call it upmixing because it doesn't destinguish audio placement at all like most upmixers dry.

  • Kougeru

    2:25:27 PM GMT+00:00 Sep 1, 2012

    Same exact issue. VERY annoying. Needs to be fixed..this has been happening for months now.

  • battlepriest

    9:25:53 PM GMT+00:00 Aug 12, 2012

    You guys have screwed up the volume settings. All flash video plays at 100% volume every damned time. I have to re-set the Flash audio separately from the system audio.
    Nice one guys - way to take a product that worked fine and mess it up.

  • sndwv

    1:52:59 PM GMT+00:00 Jul 31, 2012

    Same problem, sound over all speakers and bassy and LOUD.

    W7/64, IE9, Creative X-fi Titanium, Flash 11.3.300.268, Logitech Z906

    Temporary workaround for me is using Creative's DTS connect pack, which bypasses the software mixer and send a DTS-encoded signal to the Z906's receiver.

Duplicate ID
Reported By jonaszx


State Closed
Status Withdrawn
Reason AsDesigned


Priority 3-High
Frequency Some users will encounter
Failure Type Performance Issue
Product Area Audio


Found In Build 11.3.300.265
Fixed In Build

Attachments (1)

Votes (19)

  • DarkUltra

    8:51:02 AM GMT+00:00 Sep 13, 2013

    It makes audio in youtube videos very poor. I would rather like to decide for myself if I wanto upmix stereo content or not. It is also about time Adobe Flash supports 5.1 and 7.1 audio.

  • Klades0

    2:07:54 PM GMT+00:00 Mar 16, 2013

    I have this problem with all flash content on my computer. I use an Asus Xonar Essence STX. My computer is set for 7.1 surround to take advantage of software and hardware features with the card, but the physical output is stereo, and flash ends up being far, far louder than anything else.

  • edechamps

    12:30:26 PM GMT+00:00 Mar 16, 2013

    This is of course insanely stupid for a number of reasons. First of all it is inconsistent with all other software out there (e.g. audio players such as foobar2000). Second, stereo streams are not supposed to be "expanded" when played on a 5.1 stream, as they were never meant to be played back using rear speakers. Third, it results in excessive bass output because acoustic summation typically results in higher sound pressure at the listening position in the lower portion of the spectrum. And finally, if the user really wants upmixing despite all these issues, most audio drivers allow him to do that at the system level anyway, which makes much more sense than doing it at the application level.

    And, last but not least, because of this behavior your software does not comply with current 5.1 standards, namely ITU-R BS.775:

    Page 12: "When a stereophonic programme is to be presented over a reproduction system with three frontal loudspeakers, the left and right signals of the stereo programme should be presented respectively over the left and right loudspeakers only.

    When there is no surround signal in a programme, surround loudspeakers should not be activated."

  • CurvedPoint

    3:42:18 PM GMT+00:00 Jan 22, 2013

    I VOTE YES!!
    Been having this problem for ages now. It happens on all sound cards from what I can see. It was happening with onboard realtek and now with Creative Sound Blaster X-Fi Titanium Fatal1ty.

  • weksi

    2:00:49 PM GMT+00:00 Nov 7, 2012

    I'd much prefer the original stereo sound for YouTube and similar videos. The surround sounds unnatural and too bassy.

  • Squall_Leonhart69r

    5:04:05 PM GMT+00:00 Sep 12, 2012

    fix the damn problem, its screwing with volume matrix's

  • MysticalTemptress

    8:47:30 PM GMT+00:00 Sep 4, 2012

    Ugh even with the build update on 3 I"M STILL getting that reset at max and it's more annoying than ever! I so am uninstalling to the previous 11.1 or something till SOMEONE here can actually get on the move and fix this thing. 5 times today surfing the web I got blown outta my chair because the volume was at max and refuses to remember the state I had it.

  • Kougeru

    2:26:01 PM GMT+00:00 Sep 1, 2012

    Sound becomes VERY loud when it is forced through all speakers.

  • Jagiel

    7:02:07 AM GMT+00:00 Aug 22, 2012

    Same thing since 11.3, 11.4 didn't change anything. Flash player make all my Logitech x540 play simultaneously. I don't even require proper surround in flash, but bring back the stereo please.

  • JerichoRUS

    5:40:59 PM GMT+00:00 Aug 10, 2012

    Fix it, fix it please! Horrible sound, and my driver can make much better 5.1 sound than flash player.

  • mruston00

    6:46:01 PM GMT+00:00 Aug 2, 2012

    Also seem to be experiencing issue. I have a Logitech G35 surround sound headset.

  • sndwv

    1:47:21 PM GMT+00:00 Jul 31, 2012

    This is something that really should get priority. I am genuinely concerned a video or ad blasting out at full volume could damage my speakers!

  • andykamezou

    10:36:44 PM GMT+00:00 Jul 30, 2012

    'Speaker Fill' should be optional and controlled by audio driver application, but this bug basically ignore how my surround audio system should work..

  • PJDourm

    8:48:30 AM GMT+00:00 Jul 25, 2012

    Win7 64bit, Flash Player 11.4.400.231 Beta 1 (also happened with the 11.3 release)
    Any time a flash video is played the volume is set at max. I have lowered the volume in my sound settings and even tried muting flash player; but every time it goes back to max volume.

  • r3ignz

    1:51:27 PM GMT+00:00 Jul 24, 2012

    Very annoying please Adobe fix this Asap!

  • Squallboogie

    10:38:21 AM GMT+00:00 Jul 23, 2012

    This is a very annoying bug while watching videos.

  • bart5k

    7:30:19 PM GMT+00:00 Jul 22, 2012

    Please fix it. It's really annoying :(

  • lum1n

    1:15:24 PM GMT+00:00 Jul 19, 2012

    Sound is forced to play through all 5.1 speakers even if audio file is in STEREO. It's really loud, especially bass. Please, fix it.

  • fidelity42

    1:01:16 PM GMT+00:00 Jul 17, 2012

    Major issue on surround speaker setups. Needs immediate fixing,

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