Bug 82347

Summary: [GTK] WebAudio Noise Issue (pop noise)
Product: WebKit Reporter: sangho park <gouache95>
Component: Web AudioAssignee: Nobody <webkit-unassigned>
Status: RESOLVED DUPLICATE    
Severity: Normal CC: crogers, gouache95, pnormand, s.choi
Priority: P2    
Version: 528+ (Nightly build)   
Hardware: PC   
OS: Linux   
Attachments:
Description Flags
test audio none

sangho park
Reported 2012-03-27 09:04:31 PDT
there is 'pop noise' (i don't know exact technical term) issue in WebAudio. in all of the WebAudio example page, i can find pop noise. I have no clue about this issue, but i think it's not performance issue. because my test pc has very good performance and i've already test with FFT_IPP. pls show me any point of the clue. [My PC] Intel(R) Core(TM) i7-2600 CPU @ 3.40GHz (8 Core) [O/S] Linux 3.2.0-20-generic #32-Ubuntu SMP Thu Mar 22 02:22:46 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux [example page] http://chromium.googlecode.com/svn/trunk/samples/audio/visualizer-gl.html [attachment] the file contains original sound (human-voice) and webaudio output sound. you can find many pop noise in webaudio output file.
Attachments
test audio (105.60 KB, application/x-bzip)
2012-03-27 09:07 PDT, sangho park 		no flags
Details
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sangho park
Comment 1 2012-03-27 09:07:22 PDT
Created attachment 134082 [details] test audio
Philippe Normand
Comment 2 2012-03-27 09:25:32 PDT
(In reply to comment #0) > because my test pc has very good performance and i've already test with FFT_IPP. > What do you mean by that ^ ?
sangho park
Comment 3 2012-03-27 09:31:21 PDT
(In reply to comment #2) > (In reply to comment #0) > > because my test pc has very good performance and i've already test with FFT_IPP. > > > > What do you mean by that ^ ? at the first time, i tried to find performance issue. so I change the FFT to 'FFTFrameIPP.cpp' instead of 'FFTFrameGStreamer.cpp' but the result was same (has pop noise). i used non-commercial ipp_7.0.6.293_intel64..
Philippe Normand
Comment 4 2012-03-27 09:37:39 PDT
Maybe there's an issue in the webaudiosrc gst element or in AudioDestinationGStreamer. You use pulseaudio I guess? Also what versions of gst packages do you have?
sangho park
Comment 5 2012-03-27 09:40:05 PDT
(In reply to comment #4) > Maybe there's an issue in the webaudiosrc gst element or in AudioDestinationGStreamer. > > You use pulseaudio I guess? > > Also what versions of gst packages do you have? yes i use pulse audio. Plugin Details: Name: pulseaudio Description: PulseAudio plugin library Filename: /usr/lib/x86_64-linux-gnu/gstreamer-0.10/libgstpulse.so Version: 0.10.31 License: LGPL Source module: gst-plugins-good Source release date: 2012-02-20 Binary package: GStreamer Good Plugins (Ubuntu) Origin URL: https://launchpad.net/distros/ubuntu/+source/gst-plugins-good0.10
sangho park
Comment 6 2012-03-28 07:51:06 PDT
one more information... clock skew log was found.. "gst_base_audio_sink_skew_slaving:<alsasink0> correct clock skew 20259771 > 20000000" does it help to find the clue? hmm.. alsasink is same with pulsesink.
Philippe Normand
Comment 7 2012-04-16 08:15:08 PDT
I can reproduce the issue with a 64-bit build but a 32-bit build is fine. Can you confirm?
sangho park
Comment 8 2012-04-16 22:23:05 PDT
(In reply to comment #7) > I can reproduce the issue with a 64-bit build but a 32-bit build is fine. Can you confirm? I just test on 32-bit ubuntu 12.04 is it really fine on 32-bit? in my case, not fine :(
Philippe Normand
Comment 9 2012-09-13 07:36:44 PDT
*** This bug has been marked as a duplicate of bug 95833 ***
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