[u-a-dev] [Bug 84220] Re: No speech in totem using eSpeak w/ Orca

[Gilles Casse]

Hi Mikael,

Thanks for your post.

On jeu, 2007-02-22 at 22:39 +0100, Mikael Holmgren wrote:
> One problem seems to be that portaudio doesn't use the alsa "default"
> device, but use the first working one it comes across.

A recent wave.cpp selects the Alsa device with the highest number of
output channels instead of the first Alsa device. At least, sound mixing
works (more or less) on a SB128. 
A post has been sent to the PortAudio list.

> As i understand it, the default device must be used for the alsa
> softwaremixing to be done. 
> If playing some music and telling espeak to say something:
> - In the stable v19 that doesn't work, pcm_open_fail.
> In the dev version there is a patch for that, but you still get a very
> long delay, since portaudio seems to try devices until it comes to the
> default device and then espeak speaks.

Yes, Pa_Initialize enumerates the audio device. This enumeration could
be done once and then cached for further calls. An env variable, or a
conf file could indicate to PortAudio which is the short list of
interesting devices. 

These features could be perhaps welcomed by the PortAudio team. 

Best regards,

Gilles



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