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Re: Espeak Server Likes PulseAudio?



Actually, I had trouble with eSpeak when it was compiled to run with PortAudio, which I thought was the default. I recompiled it to use it's runtime mode, which uses PulseAudio if it's present and PortAudio otherwise. This eliminated the problems I was having with eSpeak and Emacspeak. I didn't feel this was a PulseAudio issue but rather a PortAudio or eSpeak issue.

On 04/07/2013 02:16 AM, Steve Holmes wrote:
Yeah, tell me about PulseAudio and its antics.  I would love to nuke
pulse here but I want to be able to use gnome here too and you know
now that gnome requires pulse to do anything with sound.  I finally
got pulse's configuration to allow native ALSA and pulse to co-exist
but I'm still trying to smooth espeak out.  I rebuilt espeak to use
ALSA (portaudio) exclusively but now I seem to lose speech
periodically and have to use emacspeak's c-e c-s command to restart
speech.  Not sure what's up there but might have to go back to using
pulse on this one.  speakup seems to be flawless with its espeakup
module.

On Sat, Mar 30, 2013 at 07:34:48AM -0700, T.V. Raman wrote:
Jason, You have articulated part of the issue correctly. The
other reason why the pulseaudio / alsa combination gives such
vastly varying results is that the layering is complex;  See
Tim's earlier note.  If you have pulseaudio on a system, do an
aplay -v of a .wav file and look at the output -- you'll see the
audio buffers getting routed through multiple layers.  Now,
depending on the soundcard and the memory buffer size it needs,
sample conversions ... this can  go horribly wrong when you
generate a lot of rapid audio requests -- something that happens
with emacspeak a lot if you perform actions that both produce
speech and a rapid sequence of auditory icons.  For the record,
the first thing I did on my work machines after upgrading to
Precise was to nuke pulseaudio -- that is getting harder and
harder to do --
"Jason" == Jason White <jason@jasonjgw.net> writes:
     Jason> Tim Cross <theophilusx@gmail.com> wrote:
     >> Note that there should be no problems with alsa and
     >> pulseaudio. Pulseaudio is not a replacement for alsa. It
     >> is another abstraction layer on top of it and pulseaudio
     >> needs alsa
     Jason>
     Jason> Part of the problem might be that PulseAudio holds
     Jason> devices open even when not in use, so that
     Jason> applications which access the Alsa layer directly fail
     Jason> to open audio devices.
     Jason>
     Jason> As I remember, there is a way to configure PulseAudio
     Jason> to relinquish devices temporarily that aren't being
     Jason> used by applications.
     Jason>
     Jason> With apologies in advance if I am wrong in the above -
     Jason> it's a while since I read about these issues.
     Jason>
     Jason> -----------------------------------------------------------------------------
     Jason> To unsubscribe from the emacspeak list or change your
     Jason> address on the emacspeak list send mail to
     Jason> "emacspeak-request@cs.vassar.edu" with a subject of
     Jason> "unsubscribe" or "help".

--
Best Regards,
--raman

--
Best Regards,
--raman

--
Best Regards,
--raman


On 3/29/13, Jason White <jason@jasonjgw.net> wrote:
Tim Cross <theophilusx@gmail.com> wrote:

Note that there should be no problems with alsa and pulseaudio.
Pulseaudio
is not a replacement for alsa. It is another abstraction layer on top of
it
and pulseaudio needs alsa

Part of the problem might be that PulseAudio holds devices open even when
not
in use, so that applications which access the Alsa layer directly fail to
open
audio devices.

As I remember, there is a way to configure PulseAudio to relinquish devices
temporarily that aren't being used by applications.

With apologies in advance if I am wrong in the above - it's a while since I
read about these issues.

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--
Christopher (CJ)
chaltain at Gmail

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