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

Bill Cox waywardgeek at gmail.com
Fri Jan 8 19:12:37 GMT 2010

Oops... It was pointed out that I got the credits wrong in the header.
 I've regenerated the second patch to correct it.


On Fri, Jan 8, 2010 at 1:08 PM, Bill Cox <waywardgeek at gmail.com> wrote:
> Hi, Luke.  Adding the ability to set PulseAudio parameters in
> speechd.conf was harder than I thought it would be, but it's done.
> Attached are two patches.  The first is the patch file to get the
> basic pulseaudio driver that you've tested.  The second is the work I
> had to do to get the PulseAudio buffering parameters exposed to the
> user through speechd.conf.  Just add these to your debian/patches
> directory and the 00list file.
> I wasn't sure where to e-mail these... sorry for the spam!
> Bill
> On Thu, Jan 7, 2010 at 7:56 AM, Bill Cox <waywardgeek at gmail.com> wrote:
>> Hi, Luke.  That's great!  For some reason, I keep expecting the Magic
>> Code Fairies to clean up code before it gets included anywhere.
>> Earlier in this thread, Rui Batista said he was going to do some
>> cleanup - making PulseAudio buffer parameters configurable again.  So,
>> naturally I didn't bother.  If you can wait a few hours, I'll do that
>> change, and post an improved patch here.
>> Bill
>> On Thu, Jan 7, 2010 at 12:31 AM, Luke Yelavich
>> <luke.yelavich at canonical.com> wrote:
>>> On Thu, Jan 07, 2010 at 03:25:47PM EST, Luke Yelavich wrote:
>>>> On Thu, Jan 07, 2010 at 03:19:32PM EST, Bill Cox wrote:
>>>> > Hi, Luke.  The new pulse drivers work well for me on both Karmic and
>>>> > Lucid, and I haven't heard of users with poor performance so far, but
>>>> > it could be machine specific.  The strange thing is you're reporting
>>>> > libao works well, and all I did was cut and paste the pulseaudio calls
>>>> > libao makes into the libao driver, so I would expect similar
>>>> > performance, other than for the buffering settings I make in the
>>>> > pulse-simple interface.
>>>> *slaps head. I didn't apply the patch I created with the new pulse file. I'll test again and get back to you,
>>> Ok, now that I actually have it aplying and built, the difference is *VERY* noticable. Currently using espeak with pulse, but will try with portaudio again since bits of short text, especially if arrowing very fast, are a little bit clicky.
>>> Long term, there is the power consumption issue that Lennart raised, since we are using the simple API, but we need to work that out as best we can, and go from there, but I think this will be going into Ubuntu very shortly, once I have done a few more tests.
>>> Great work!
>>> Luke
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