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

[Rex Dieter]

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

-- Rex