[pulseaudio-discuss] recording from Built-in Audio too slow

[Matthias Kattanek]

On Tue, 08 Apr 2014 12:10:42 -0500 Rex Dieter <rdieter at math.unl.edu> wrote

> On 04/08/2014 12:08 PM, Matthias Kattanek wrote:
> > On Tue, 08 Apr 2014 05:54:51 -0500 Rex Dieter <rdieter at math.unl.edu> wrote
> >
> >> mattes wrote:
> >>
> >>> On Sat, 05 Apr 2014 10:07:48 +0300 Tanu Kaskinen
> >>> <tanu.kaskinen at linux.intel.com> wrote
> >>>
> >>>> On Fri, 2014-03-28 at 20:27 -0700, mattes wrote:
> >>>>> Trying to record audio that is already playing on the system.
> >>>>> E.g. live conference.  For Recording is use gnome-sound-recorder or
> >>>>> audio-recorder, which by default records from the mic input.
> >>>>> Using pavucontrol as a helper, I switch the under the recording tab
> >>>>> to the 'Monitor of Built-in Audio Analog Stereo' to get access to the
> >>>>> internal audio channel.
> >>>>>
> >>>>> It works, but there is a nasty side effect. When playing back the
> >>>>> recorded
> >>>>> sound clip, I noticed  that the pitch is different. As it turns out the
> >>>>> clip is playing in slomo, roughly 10%+ slower. Enuff to be annoying. It
> >>>>> seems that playback time is longer than the actually recording time.
> >>>>>
> >>>>> I switch to a different recorder, but no change the problem still
> >>>>> evident.
> >>>>>   "'anil'" <anil at univesointegration.com>
> >>>>> One thing I noticed is that, the slow down does not occur when I record
> >>>>> e.g. from microphone. Starting the recording from the MIC input and
> >>>>> then switching during the recording to 'Monitor of Built-in Audio',
> >>>>> shows that the slowdown start when the switch happens.
> >>>>>
> >>>>> The laptop is running Fedora 19. close to be uptodate
> >>>>>
> >>>>> Any advice how this can be fixed?
> >>>>
> >>>> This might be this bug, which was fixed in 5.0:
> >>>> https://bugs.freedesktop.org/show_bug.cgi?id=66424
> >>>>
> >>>> --
> >>>> Tanu
> >>>
> >>> Thank you that is helpful. the bug seems to fit very well to the problem
> >>> I experience.
> >>>
> >>> I am in the process of upgrading my Fedora 19 pulseaudio v3 to the
> >>> current git version. Is that considered a stable version or do you folks
> >>> have stable packages available some where.
> >>>
> >>> Is pulseaudio v5 compatible with Fedora 19?
> >>
> >> It should be, you can get a packaged version here,
> >> http://repos.fedorapeople.org/repos/rdieter/pulseaudio-backport/
> >>
> > Thanks for sharing this. This definitely is a quicker way to update
> > to v5.0. I will give that a spin.
> >
> > I started building from git. Is there a way to find from the binary/package
> > what build options have been used?
> 
> Here are the gory details:
> 
> http://pkgs.fedoraproject.org/cgit/pulseaudio.git/tree/pulseaudio.spec
> 
> particularly, the section starting with
> %build
> 
I was thinking about runtime. But your right the spec file from the 
fedora source rpm have all the info i need.

Mat