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No 5.1 surround sound (he-aac with html5)

  • 8 replies
  • 10 have this problem
  • Last reply by guigs

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We produced 5.1 he-aac files

In Firefox only a stereo-downmix is to carry. IE, Chrome and Safari on Mac do the right - transfering the 5.1 signal to the sound card.

Any Ideas? Is this a known FF bug?

I currently use FF 33 but has never really performed at pevious versions.

Thanks for your help Sebastian

All Replies (8)

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I just tested it in version 35 Nightly, something changed :-)

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It seems to work but the sound is awfull at my notebook. It sounds blurred. Maybe the decoder is 5.1 but buggy now?

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Hi Sebastian_Fisahn, There was a new Web Audio too that was added to the Web Console in this new version. But the website you are referring to is using JW player.

I also tried to research the JW support and it seems it only on Windows?

IF you download the audio and play it on a local computer, does the sound quality change?

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I do not know if this is a current bug, there is no harm in filling one however.

Please see [] and their link for how to file a good first bug.

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I played our native channel-test-file via download here:

(the file:

The new audio-console is "Waiting for an audio-context to be created".

I'm afraid FF don't like he-aac covered in mp4??

Then I have tested with "aac" or "m4a" file-endings also with no success.

Best Sebastian

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Sebastian, I am seeing the same in the audio console. I will follow up on this. See may need to investigate this more.

For the he-acc, this may be related

It does look like it is an issue in FF, and the bugs will be able to further investigate a fix. In the meantime, however are there other formats of the audio that could be offered for Firefox users?

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I also tested 5.1 ogg/vorbis without any success. I'm sure that i googled, thats a already known FF bug.

Best Sebastian

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I believe I have misinterpreted the expected behavior of the Web Audio console.