Re: [orca-list] [ANNOUNCE] libao (new audio driver for speechd including working pulseaudio support).

[Marco Skambraks <marco openblinux de>]

cool feedback - thanks
if you want to try different settings for latency etc.
you can change the define in speechd/src/audio/libao.c
#define AO_SEND_BYTES 256

if you reduce this value 128,64,32 ... and re-compile speechd
you can generate a faster resonse play/stop

the reason for me to create the patch was the alsa echo problem
if speech-dispatcher gets new strings very rapidly
the sound-output was a kind of a mixed speech output
sounds lke an echo
with libao and alsa there is no echo anymore :-)

happy testing

marco


On Thu, 17 Dec 2009, Hammer Attila wrote:

> Dear List,
>
> Halim, this driver is fantastic my machine.
> I tested the new driver.
> Before with this testing driver is publicated, Pulseaudio doing 2-3 second 
> latency when Speech-dispatcher is running in Ubuntu Karmic my notebook sound 
> card and my desktop computer sound card.
>
> I need remove Pulseaudio and coming back with alsa and do lot of workarounds 
> to solving problems (volume increase/decrease workaround with custom 
> keybinding command with amixer, remove unneed pulseaudio packages if I would 
> like listen musics, videos etc).
>
> Now when I testing the new driver, I am try the driver with Ubuntu Lucid 
> system.
>
> What can I see after when all required steps I doing the driver installation?
> I get back my fast speech navigation when Pulseaudio is running my notebook.
> Only a very minimal latency I see when I typing, but this is not matter (not 
> 3 second latency). :-):-) Alsa is possible very little faster. But the new 
> testing driver is very stable. Tomorrow I testing longest time.
>
> What can I do when I would like compile and install the new driver?
> Halim and me wroted 2 or 3 priwate letter, final, following simple method is 
> working my machine. Note: Please, ewerybody try this method with only your 
> risk!
> Important, following method working with Karmic and Lucid only. Halim, if I 
> any step writing incorrect, please complete. Excuse me my bad english:
>
> 1. In Lucid, I downloaded speech-dispatcher source code from following 
> command with a directory:
> sudo apt-get source speech-dispatcher
>
> 2. Please do following commands:
> sudo apt-get install libao-dev (this is important)
> sudo apt-get build-dep speech-dispatcher
>
> 3. I navigate the speech-dispatcher source directory.
>
> 4. Applyed the new patch:
> patch -p1 <../speechd-libao.diff
> Please replace the patch path if you storing Halim sent diff file with 
> another place. :-):-)
>
> 5. I run dpkg-buildpackage command.
>
> 6. I installed with following packages with prewious directory (need do a 
> sudo cd .. command):
> speech-dispatcher, python-speechd, libspeechd2.
> Possible your system needs another packages, but you found with rebuilded 
> packages with your needs. Possible the version number is change with your 
> system.
>
> 7. I change the /etc/libao.conf with default_driver=alsa to 
> default_driver=pulse.
>
> 8. Final, reconfiguring speech-dispatcher with using libao audio output 
> module. Don't worry, my machine spd-conf ask me the suggested way is Alsa, 
> Pulse, Oss, but don't need correct your answer. :-):-)
>
> Enjoy, the new driver working my machine.
>
> Attila
> _______________________________________________
> Orca-list mailing list
> Orca-list gnome org
> http://mail.gnome.org/mailman/listinfo/orca-list
> Visit http://live.gnome.org/Orca for more information on Orca.
> The manual is at 
> http://library.gnome.org/users/gnome-access-guide/nightly/ats-2.html
> The FAQ is at http://live.gnome.org/Orca/FrequentlyAskedQuestions
> Netiquette Guidelines are at 
> http://live.gnome.org/Orca/FrequentlyAskedQuestions/NetiquetteGuidelines
> Log bugs and feature requests at http://bugzilla.gnome.org

-------------------------------
The OpenBlinux Project