Le 06/11/2017 à 11:00, Tanu Kaskinen a écrit :
On Sun, 2017-11-05 at 19:23 +0100, [email protected] wrote:
Le 05/11/2017 à 10:54, Tanu Kaskinen a écrit :
The alsa sink will log "Underrun!" if PulseAudio doesn't write fast
enough to alsa, but if you're only using jack as the output in
PulseAudio, then that's irrelevant.
Other modules that maintain their own buffers may also have underrun or
overrun situations. I don't have a comprehensive list of them. I know
module-loopback logs "Could not peek into queue" when it has an
underrun in its buffer.
PulseAudio may have an overrun/underrun problem like jack/QjackCtl may
also be concerned, right?
Sorry, I don't understand this sentence.
I would just like to be sure jack/QjackCtl may have overrun/underrun
problems, but forget that since you have already well answered to this
question with “Other modules that maintain their own buffers may also
have underrun or overrun situations”. Sorry for this.
Resampling can't be disabled. If a stream uses different sample rate
than the sink where it plays to, then PulseAudio has to do resampling,
i.e. converting audio from one sample rate to another.
Remixing means adapting between different channel configurations when
the stream channels don't match with the sink channels. If remixing is
disabled, then channels that exist on the stream but not on the sink
are dropped, and channels that exist on the sink but not on the stream
get silence.
I compared resampling to remixing… Again sorry.
Are there other things similar to a drop-out in PulseAudio (if its
resampling is disabled)?
I already answered this question in my last mail as well as I can.
Does your sentence mean “There are no other problems which may modify
your sound with your configuration on the side of PulseAudio”? (= you
are sure there are no other problems)
I would just like to be sure that with the following configuration, I
may only get underrun or rewind problems, because I can easily identify
them in the log thanks to you. I simply want the sound of the source
file to exactly match the sound I will hear/record (by jack/QjackCtl).
If it is not the case because of a problem, I need to know it. I prefer
to ask you because if your answers may avoid me from manually checking
each entry of the log with the level “debug” (at least 1830 lines since
the boot) to know if the sound has been modified due to a problem, it
will help me a lot.
Assuming the audio source has the same following configuration, here is
the configuration in “/etc/pulse/daemon.conf” (I show only the values I
changed):
enable-remixing = no
enable-lfe-remixing = no
default-sample-format = float32le
default-sample-rate = 48000
alternate-sample-rate = 48000
default-sample-channels = 2
default-channel-map = front-left,front-right
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