Soundcard 'monitor' stream doesn't arrive with Spectrum plugin
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Soundcard 'monitor' stream doesn't arrive with Spectrum plugin
 
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I'm hoping to base a tutorial demo on the first python example linked
below, and I attempted to test its logic by playing music from Rhythmbox through my (Ubuntu Oneiric) soundcard while visualising the result of the 'spectrum' FFT as changing numbers streaming on the console. Sadly this first debugging step was a failure. http://pzwart3.wdka.hro.nl/wiki/Spectrum.py The spectrum plugin loaded by this python script only ever reports -60 decibels for every frequency band in the spectrum, regardless how loud I turn up the music! I have tried both alsasrc and pulsesrc with various device names (default, pulse, the introspected alsa monitor device name from pactl) at the beginning of the listener_desc pipeline (declared in the linked code). In most of the cases I've tried (barring typos) the pipeline seems to be established and run perfectly fine (as far as I can tell) but somehow no sound frequencies show up in the frequency analysis from the spectrum plugin. Does this python code work for anyone else? How would I verify that the pipeline is correct, or narrow down the problem? Any suggestions what the initial source plugin or entire pipeline should in fact be on an Ubuntu system to get loudnesses per frequency range streaming out of the spectrum plugin to the console using this code as a reference? Thanks for any help. Cefn http://cefn.com _______________________________________________ gstreamer-devel mailing list [hidden email] http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel |
Re: Soundcard 'monitor' stream doesn't arrive with Spectrum plugin
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On 06/12/2012 04:13 AM, Cefn Hoile wrote:
> I'm hoping to base a tutorial demo on the first python example linked > below, and I attempted to test its logic by playing music from > Rhythmbox through my (Ubuntu Oneiric) soundcard while visualising the > result of the 'spectrum' FFT as changing numbers streaming on the > console. Sadly this first debugging step was a failure. > > http://pzwart3.wdka.hro.nl/wiki/Spectrum.py > > The spectrum plugin loaded by this python script only ever reports -60 > decibels for every frequency band in the spectrum, regardless how loud > I turn up the music! spectrum threshold=-96 Stefan > > I have tried both alsasrc and pulsesrc with various device names > (default, pulse, the introspected alsa monitor device name from pactl) > at the beginning of the listener_desc pipeline (declared in the linked > code). In most of the cases I've tried (barring typos) the pipeline > seems to be established and run perfectly fine (as far as I can tell) > but somehow no sound frequencies show up in the frequency analysis > from the spectrum plugin. > > Does this python code work for anyone else? How would I verify that > the pipeline is correct, or narrow down the problem? Any suggestions > what the initial source plugin or entire pipeline should in fact be on > an Ubuntu system to get loudnesses per frequency range streaming out > of the spectrum plugin to the console using this code as a reference? > > Thanks for any help. > > Cefn > http://cefn.com > _______________________________________________ > gstreamer-devel mailing list > [hidden email] > http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel _______________________________________________ gstreamer-devel mailing list [hidden email] http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel |
Re: Soundcard 'monitor' stream doesn't arrive with Spectrum plugin
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On 12 June 2012 14:40, Stefan Sauer <[hidden email]> wrote:
> On 06/12/2012 04:13 AM, Cefn Hoile wrote: >> I'm hoping to base a tutorial demo on the first python example linked >> below, and I attempted to test its logic by playing music from >> Rhythmbox through my (Ubuntu Oneiric) soundcard while visualising the >> result of the 'spectrum' FFT as changing numbers streaming on the >> console. Sadly this first debugging step was a failure. >> >> http://pzwart3.wdka.hro.nl/wiki/Spectrum.py >> >> The spectrum plugin loaded by this python script only ever reports -60 >> decibels for every frequency band in the spectrum, regardless how loud >> I turn up the music! > You can change that: > spectrum threshold=-96 > > Stefan >> >> I have tried both alsasrc and pulsesrc with various device names >> (default, pulse, the introspected alsa monitor device name from pactl) >> at the beginning of the listener_desc pipeline (declared in the linked >> code). In most of the cases I've tried (barring typos) the pipeline >> seems to be established and run perfectly fine (as far as I can tell) >> but somehow no sound frequencies show up in the frequency analysis >> from the spectrum plugin. >> >> Does this python code work for anyone else? How would I verify that >> the pipeline is correct, or narrow down the problem? Any suggestions >> what the initial source plugin or entire pipeline should in fact be on >> an Ubuntu system to get loudnesses per frequency range streaming out >> of the spectrum plugin to the console using this code as a reference? >> >> Thanks for any help. >> >> Cefn >> http://cefn.com >> _______________________________________________ >> gstreamer-devel mailing list >> [hidden email] >> http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel > > _______________________________________________ > gstreamer-devel mailing list > [hidden email] > http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel Thanks for the suggestion, Stefan. You're right you can change it :) Now I get regular lines which report -96 instead of -60 ... data: -96.0 -96.0 -96.0 -96.0 -96.0 -96.0 -96.0 -96.0 My current pipeline looks like this... pulsesrc device="alsa_output.pci-0000_00_1b.0.analog-stereo.monitor" ! spectrum threshold=-96 interval=1000000000 bands=8 ! fakesink ...and still the DB levels never vary depending on output from the soundcard. Cefn http://cefn.com _______________________________________________ gstreamer-devel mailing list [hidden email] http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel |
Re: Soundcard 'monitor' stream doesn't arrive with Spectrum plugin
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On 06/12/2012 04:25 PM, Cefn Hoile wrote:
> On 12 June 2012 14:40, Stefan Sauer <[hidden email]> wrote: >> On 06/12/2012 04:13 AM, Cefn Hoile wrote: >>> I'm hoping to base a tutorial demo on the first python example linked >>> below, and I attempted to test its logic by playing music from >>> Rhythmbox through my (Ubuntu Oneiric) soundcard while visualising the >>> result of the 'spectrum' FFT as changing numbers streaming on the >>> console. Sadly this first debugging step was a failure. >>> >>> http://pzwart3.wdka.hro.nl/wiki/Spectrum.py >>> >>> The spectrum plugin loaded by this python script only ever reports -60 >>> decibels for every frequency band in the spectrum, regardless how loud >>> I turn up the music! >> You can change that: >> spectrum threshold=-96 >> >> Stefan >>> I have tried both alsasrc and pulsesrc with various device names >>> (default, pulse, the introspected alsa monitor device name from pactl) >>> at the beginning of the listener_desc pipeline (declared in the linked >>> code). In most of the cases I've tried (barring typos) the pipeline >>> seems to be established and run perfectly fine (as far as I can tell) >>> but somehow no sound frequencies show up in the frequency analysis >>> from the spectrum plugin. >>> >>> Does this python code work for anyone else? How would I verify that >>> the pipeline is correct, or narrow down the problem? Any suggestions >>> what the initial source plugin or entire pipeline should in fact be on >>> an Ubuntu system to get loudnesses per frequency range streaming out >>> of the spectrum plugin to the console using this code as a reference? >>> >>> Thanks for any help. >>> >>> Cefn >>> http://cefn.com >>> _______________________________________________ >>> gstreamer-devel mailing list >>> [hidden email] >>> http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel >> _______________________________________________ >> gstreamer-devel mailing list >> [hidden email] >> http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel > Thanks for the suggestion, Stefan. You're right you can change it :) > Now I get regular lines which report -96 instead of -60 ... > > data: -96.0 -96.0 -96.0 -96.0 -96.0 -96.0 -96.0 -96.0 > > My current pipeline looks like this... > > pulsesrc device="alsa_output.pci-0000_00_1b.0.analog-stereo.monitor" ! > spectrum threshold=-96 interval=1000000000 bands=8 ! fakesink > > ...and still the DB levels never vary depending on output from the soundcard. monitoring the right monitor-port? Try gst-launch -e pulsesrc device="alsa_output.pci-0000_00_1b.0.analog-stereo.monitor" ! wavenc ! filesink location=monitor.wav and check the resulting wav file. Stefan > > Cefn > http://cefn.com > _______________________________________________ > gstreamer-devel mailing list > [hidden email] > http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel _______________________________________________ gstreamer-devel mailing list [hidden email] http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel |
Re: Soundcard 'monitor' stream doesn't arrive with Spectrum plugin
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On 18 June 2012 16:27, Stefan Sauer <[hidden email]> wrote:
> On 06/12/2012 04:25 PM, Cefn Hoile wrote: >> On 12 June 2012 14:40, Stefan Sauer <[hidden email]> wrote: >>> On 06/12/2012 04:13 AM, Cefn Hoile wrote: >>>> I'm hoping to base a tutorial demo on the first python example linked >>>> below, and I attempted to test its logic by playing music from >>>> Rhythmbox through my (Ubuntu Oneiric) soundcard while visualising the >>>> result of the 'spectrum' FFT as changing numbers streaming on the >>>> console. Sadly this first debugging step was a failure. >>>> >>>> http://pzwart3.wdka.hro.nl/wiki/Spectrum.py >>>> >>>> The spectrum plugin loaded by this python script only ever reports -60 >>>> decibels for every frequency band in the spectrum, regardless how loud >>>> I turn up the music! >>> You can change that: >>> spectrum threshold=-96 >>> >>> Stefan >>>> I have tried both alsasrc and pulsesrc with various device names >>>> (default, pulse, the introspected alsa monitor device name from pactl) >>>> at the beginning of the listener_desc pipeline (declared in the linked >>>> code). In most of the cases I've tried (barring typos) the pipeline >>>> seems to be established and run perfectly fine (as far as I can tell) >>>> but somehow no sound frequencies show up in the frequency analysis >>>> from the spectrum plugin. >>>> >>>> Does this python code work for anyone else? How would I verify that >>>> the pipeline is correct, or narrow down the problem? Any suggestions >>>> what the initial source plugin or entire pipeline should in fact be on >>>> an Ubuntu system to get loudnesses per frequency range streaming out >>>> of the spectrum plugin to the console using this code as a reference? >>>> >>>> Thanks for any help. >>>> >>>> Cefn >>>> http://cefn.com >>>> _______________________________________________ >>>> gstreamer-devel mailing list >>>> [hidden email] >>>> http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel >>> _______________________________________________ >>> gstreamer-devel mailing list >>> [hidden email] >>> http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel >> Thanks for the suggestion, Stefan. You're right you can change it :) >> Now I get regular lines which report -96 instead of -60 ... >> >> data: -96.0 -96.0 -96.0 -96.0 -96.0 -96.0 -96.0 -96.0 >> >> My current pipeline looks like this... >> >> pulsesrc device="alsa_output.pci-0000_00_1b.0.analog-stereo.monitor" ! >> spectrum threshold=-96 interval=1000000000 bands=8 ! fakesink >> >> ...and still the DB levels never vary depending on output from the soundcard. > Then I'd say there is a different problem. Are you sure you are > monitoring the right monitor-port? > Try gst-launch -e pulsesrc > device="alsa_output.pci-0000_00_1b.0.analog-stereo.monitor" ! wavenc ! > filesink location=monitor.wav > and check the resulting wav file. > > Stefan >> >> Cefn >> http://cefn.com >> _______________________________________________ >> gstreamer-devel mailing list >> [hidden email] >> http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel > > _______________________________________________ > gstreamer-devel mailing list > [hidden email] > http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel Based on the results of the test you suggest, it is indeed silent. It makes me think I must have the wrong audio device but then I don't know what other choices I have. Does monitor need to be activated somehow? If I run the following to see all the possible names pulseaudio can make sense of, I've tried all the values which appear and they all produce silent .wav files. As you can see from the 'RUNNING' output below, Gstreamer is able to activate the streams though. pactl list short sources 0 alsa_output.pci-0000_01_00.1.hdmi-stereo.monitor module-alsa-card.c s16le 2ch 44100Hz RUNNING 1 alsa_output.pci-0000_00_1b.0.analog-stereo.monitor module-alsa-card.c s16le 2ch 44100Hz IDLE 2 alsa_input.pci-0000_00_1b.0.analog-stereo module-alsa-card.c s16le 2ch 44100Hz SUSPENDED Any ideas for something to try? I believe I have a stock build (had no asound.conf or ~/asoundrc until just now when I was experimenting and trying an alsa force-reload according to https://wiki.archlinux.org/index.php/PulseAudio/Examples#ALSA_Monitor_source). _______________________________________________ gstreamer-devel mailing list [hidden email] http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel |
Re: Soundcard 'monitor' stream doesn't arrive with Spectrum plugin
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On 18 June 2012 17:11, Cefn Hoile <[hidden email]> wrote:
> On 18 June 2012 16:27, Stefan Sauer <[hidden email]> wrote: >> On 06/12/2012 04:25 PM, Cefn Hoile wrote: >>> On 12 June 2012 14:40, Stefan Sauer <[hidden email]> wrote: >>>> On 06/12/2012 04:13 AM, Cefn Hoile wrote: >>>>> I'm hoping to base a tutorial demo on the first python example linked >>>>> below, and I attempted to test its logic by playing music from >>>>> Rhythmbox through my (Ubuntu Oneiric) soundcard while visualising the >>>>> result of the 'spectrum' FFT as changing numbers streaming on the >>>>> console. Sadly this first debugging step was a failure. >>>>> >>>>> http://pzwart3.wdka.hro.nl/wiki/Spectrum.py >>>>> >>>>> The spectrum plugin loaded by this python script only ever reports -60 >>>>> decibels for every frequency band in the spectrum, regardless how loud >>>>> I turn up the music! >>>> You can change that: >>>> spectrum threshold=-96 >>>> >>>> Stefan >>>>> I have tried both alsasrc and pulsesrc with various device names >>>>> (default, pulse, the introspected alsa monitor device name from pactl) >>>>> at the beginning of the listener_desc pipeline (declared in the linked >>>>> code). In most of the cases I've tried (barring typos) the pipeline >>>>> seems to be established and run perfectly fine (as far as I can tell) >>>>> but somehow no sound frequencies show up in the frequency analysis >>>>> from the spectrum plugin. >>>>> >>>>> Does this python code work for anyone else? How would I verify that >>>>> the pipeline is correct, or narrow down the problem? Any suggestions >>>>> what the initial source plugin or entire pipeline should in fact be on >>>>> an Ubuntu system to get loudnesses per frequency range streaming out >>>>> of the spectrum plugin to the console using this code as a reference? >>>>> >>>>> Thanks for any help. >>>>> >>>>> Cefn >>>>> http://cefn.com >>>>> _______________________________________________ >>>>> gstreamer-devel mailing list >>>>> [hidden email] >>>>> http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel >>>> _______________________________________________ >>>> gstreamer-devel mailing list >>>> [hidden email] >>>> http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel >>> Thanks for the suggestion, Stefan. You're right you can change it :) >>> Now I get regular lines which report -96 instead of -60 ... >>> >>> data: -96.0 -96.0 -96.0 -96.0 -96.0 -96.0 -96.0 -96.0 >>> >>> My current pipeline looks like this... >>> >>> pulsesrc device="alsa_output.pci-0000_00_1b.0.analog-stereo.monitor" ! >>> spectrum threshold=-96 interval=1000000000 bands=8 ! fakesink >>> >>> ...and still the DB levels never vary depending on output from the soundcard. >> Then I'd say there is a different problem. Are you sure you are >> monitoring the right monitor-port? >> Try gst-launch -e pulsesrc >> device="alsa_output.pci-0000_00_1b.0.analog-stereo.monitor" ! wavenc ! >> filesink location=monitor.wav >> and check the resulting wav file. >> >> Stefan >>> >>> Cefn >>> http://cefn.com >>> _______________________________________________ >>> gstreamer-devel mailing list >>> [hidden email] >>> http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel >> >> _______________________________________________ >> gstreamer-devel mailing list >> [hidden email] >> http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel > > Based on the results of the test you suggest, it is indeed silent. It > makes me think I must have the wrong audio device but then I don't > know what other choices I have. Does monitor need to be activated > somehow? > > If I run the following to see all the possible names pulseaudio can > make sense of, I've tried all the values which appear and they all > produce silent .wav files. As you can see from the 'RUNNING' output > below, Gstreamer is able to activate the streams though. > > pactl list short sources > 0 alsa_output.pci-0000_01_00.1.hdmi-stereo.monitor module-alsa-card.c s16le > 2ch 44100Hz RUNNING > 1 alsa_output.pci-0000_00_1b.0.analog-stereo.monitor module-alsa-card.c s16le > 2ch 44100Hz IDLE > 2 alsa_input.pci-0000_00_1b.0.analog-stereo module-alsa-card.c s16le > 2ch 44100Hz SUSPENDED > > Any ideas for something to try? I believe I have a stock build (had no > asound.conf or ~/asoundrc until just now when I was experimenting and > trying an alsa force-reload according to > https://wiki.archlinux.org/index.php/PulseAudio/Examples#ALSA_Monitor_source). I have success! Seeing all the reported problems with NVidia cards at https://wiki.archlinux.org/index.php/PulseAudio/Examples#ALSA_Monitor_source I checked to see if I had NVidia. I have dual audio combining Intel and NVidia, which is probably subject to the bug at ftp://download.nvidia.com/XFree86/gpu-hdmi-audio-document/gpu-hdmi-audio.html#_issues_in_pulseaudio I speculatively installed Pavucontrol and turned off the HDMI output (which wasn't being used by my audio programs anyway according to pavucontrol). Restarted alsa and pulseaudio with 'alsa force-reload' and suddenly GStreamer is responding to the monitor output from my soundcard. Thanks for the steer, it helped me along the way to a fix. Cefn http://cefn.com _______________________________________________ gstreamer-devel mailing list [hidden email] http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel |
Re: Soundcard 'monitor' stream doesn't arrive with Spectrum plugin
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On 06/18/2012 09:19 PM, Cefn Hoile wrote:
> On 18 June 2012 17:11, Cefn Hoile <[hidden email]> wrote: >> On 18 June 2012 16:27, Stefan Sauer <[hidden email]> wrote: >>> On 06/12/2012 04:25 PM, Cefn Hoile wrote: >>>> On 12 June 2012 14:40, Stefan Sauer <[hidden email]> wrote: >>>>> On 06/12/2012 04:13 AM, Cefn Hoile wrote: >>>>>> I'm hoping to base a tutorial demo on the first python example linked >>>>>> below, and I attempted to test its logic by playing music from >>>>>> Rhythmbox through my (Ubuntu Oneiric) soundcard while visualising the >>>>>> result of the 'spectrum' FFT as changing numbers streaming on the >>>>>> console. Sadly this first debugging step was a failure. >>>>>> >>>>>> http://pzwart3.wdka.hro.nl/wiki/Spectrum.py >>>>>> >>>>>> The spectrum plugin loaded by this python script only ever reports -60 >>>>>> decibels for every frequency band in the spectrum, regardless how loud >>>>>> I turn up the music! >>>>> You can change that: >>>>> spectrum threshold=-96 >>>>> >>>>> Stefan >>>>>> I have tried both alsasrc and pulsesrc with various device names >>>>>> (default, pulse, the introspected alsa monitor device name from pactl) >>>>>> at the beginning of the listener_desc pipeline (declared in the linked >>>>>> code). In most of the cases I've tried (barring typos) the pipeline >>>>>> seems to be established and run perfectly fine (as far as I can tell) >>>>>> but somehow no sound frequencies show up in the frequency analysis >>>>>> from the spectrum plugin. >>>>>> >>>>>> Does this python code work for anyone else? How would I verify that >>>>>> the pipeline is correct, or narrow down the problem? Any suggestions >>>>>> what the initial source plugin or entire pipeline should in fact be on >>>>>> an Ubuntu system to get loudnesses per frequency range streaming out >>>>>> of the spectrum plugin to the console using this code as a reference? >>>>>> >>>>>> Thanks for any help. >>>>>> >>>>>> Cefn >>>>>> http://cefn.com >>>>>> _______________________________________________ >>>>>> gstreamer-devel mailing list >>>>>> [hidden email] >>>>>> http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel >>>>> _______________________________________________ >>>>> gstreamer-devel mailing list >>>>> [hidden email] >>>>> http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel >>>> Thanks for the suggestion, Stefan. You're right you can change it :) >>>> Now I get regular lines which report -96 instead of -60 ... >>>> >>>> data: -96.0 -96.0 -96.0 -96.0 -96.0 -96.0 -96.0 -96.0 >>>> >>>> My current pipeline looks like this... >>>> >>>> pulsesrc device="alsa_output.pci-0000_00_1b.0.analog-stereo.monitor" ! >>>> spectrum threshold=-96 interval=1000000000 bands=8 ! fakesink >>>> >>>> ...and still the DB levels never vary depending on output from the soundcard. >>> Then I'd say there is a different problem. Are you sure you are >>> monitoring the right monitor-port? >>> Try gst-launch -e pulsesrc >>> device="alsa_output.pci-0000_00_1b.0.analog-stereo.monitor" ! wavenc ! >>> filesink location=monitor.wav >>> and check the resulting wav file. >>> >>> Stefan >>>> Cefn >>>> http://cefn.com >>>> _______________________________________________ >>>> gstreamer-devel mailing list >>>> [hidden email] >>>> http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel >>> _______________________________________________ >>> gstreamer-devel mailing list >>> [hidden email] >>> http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel >> Based on the results of the test you suggest, it is indeed silent. It >> makes me think I must have the wrong audio device but then I don't >> know what other choices I have. Does monitor need to be activated >> somehow? >> >> If I run the following to see all the possible names pulseaudio can >> make sense of, I've tried all the values which appear and they all >> produce silent .wav files. As you can see from the 'RUNNING' output >> below, Gstreamer is able to activate the streams though. >> >> pactl list short sources >> 0 alsa_output.pci-0000_01_00.1.hdmi-stereo.monitor module-alsa-card.c s16le >> 2ch 44100Hz RUNNING >> 1 alsa_output.pci-0000_00_1b.0.analog-stereo.monitor module-alsa-card.c s16le >> 2ch 44100Hz IDLE >> 2 alsa_input.pci-0000_00_1b.0.analog-stereo module-alsa-card.c s16le >> 2ch 44100Hz SUSPENDED >> >> Any ideas for something to try? I believe I have a stock build (had no >> asound.conf or ~/asoundrc until just now when I was experimenting and >> trying an alsa force-reload according to >> https://wiki.archlinux.org/index.php/PulseAudio/Examples#ALSA_Monitor_source). > I have success! > > Seeing all the reported problems with NVidia cards at > https://wiki.archlinux.org/index.php/PulseAudio/Examples#ALSA_Monitor_source > I checked to see if I had NVidia. I have dual audio combining Intel > and NVidia, which is probably subject to the bug at > ftp://download.nvidia.com/XFree86/gpu-hdmi-audio-document/gpu-hdmi-audio.html#_issues_in_pulseaudio > > I speculatively installed Pavucontrol and turned off the HDMI output > (which wasn't being used by my audio programs anyway according to > pavucontrol). Restarted alsa and pulseaudio with 'alsa force-reload' > and suddenly GStreamer is responding to the monitor output from my > soundcard. > > Thanks for the steer, it helped me along the way to a fix. Awesome, glad to head that it now works. Stefan > > Cefn > http://cefn.com > _______________________________________________ > gstreamer-devel mailing list > [hidden email] > http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel _______________________________________________ gstreamer-devel mailing list [hidden email] http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel |
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