Comments (16)
Interesting. I think I hear it, but is there a specific timecode in one of those songs that you year it the most at?
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Not quite timecodes but still.
Track 1:
00:32~00:35 [slight chirp]
~0:37 [even slighter]
It's 1 AM here so can't turn music on for a long time but I have added track 3 which is a copy of this video: http://www.youtube.com/watch?v=ZK0TvORCnA0 in m4a format.
Compare them, and at about 0:54 just before the main riff comes in you hear these chirps too.
from aac.js.
OK I'll take a look. Thanks for reporting, and by the way, awesome app!
from aac.js.
Hehe, thanks, made a small video about it recently. http://www.youtube.com/watch?v=8XF-FwMMBEM
It would be nothing without your code though! Thanks a lot
from aac.js.
You should add a link to it to https://github.com/audiocogs/aurora.js/wiki/Known-Uses :)
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After fef4ab2 it sounds a little better, less pops I think, but I still hear some really high pitched overtones sometimes. Still looking.
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Uh, now i need to figure out how to compile it and test it ^^''''
from aac.js.
We've been experiencing the same issues on our platform too. I've tried forcing a resampling etc. nothing works.
We use VBR encoding via faac, and if the quality level is anything less than 100, the noise gets worse, at around 70-80 it starts getting impossible to listen to the audio.
Whoever fixes this is god lol
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I also hear high-pitched static, in my case with ADTS-encoded AAC. I can provide sample files if needed.
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ADTS encoded AAC at our end too. Is this an ADTS specific issue?
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Sample files would be very useful, thanks.
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Here's an example: http://1drv.ms/1OrjGDf
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The reason it sounds weird in this case is that the file is encoded as an HE-v2 AAC file, which is not currently supported by AAC.js. The SBR (spectral band replication) data is being ignored currently, which accounts for the high pitched overtones you hear. See #1 for the open issue about HE-AAC support, and read more about it on Wikipedia.
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Is there are similar problem with VBR as well?
On Sun, Apr 19, 2015 at 7:42 AM, Devon Govett [email protected]
wrote:
The reason it sounds weird in this case is that the file is encoded as an
HE-v2 AAC file, which is not currently supported by AAC.js. The SBR (spectral
band replication http://en.wikipedia.org/wiki/Spectral_band_replication)
data is being ignored currently, which accounts for the high pitched
overtones you hear. See #1 #1
for the open issue about HE-AAC support, and read more about it on
Wikipedia
http://en.wikipedia.org/wiki/High-Efficiency_Advanced_Audio_Coding.—
Reply to this email directly or view it on GitHub
#4 (comment).
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@bitonator do you have a sample file?
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FYI work on SBR happening here: #13
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Related Issues (14)
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