espeakup and sound cards?

Kyle kyle4jesus at
Sat Mar 5 16:01:14 EST 2011

On 03/05/2011 03:32 PM, Jacob Schmude wrote:
> Hash: SHA1
> Hi Steve
> No, that's not the issue in your case. The volume bug exists when
> espeak outputs to Pulse, however speech dispatcher doesn't use
> Espeak's output routines. Sd interfaces to Pulse directly, uses
> libespeak to synthesize, then outputs the synthesized data itself. I
> haven't had any volume instabilities with speech dispatcher and
> Pulseaudio, but I did recompile speech dispatcher with pulseaudio
> support (the default Arch packages do not have it unless it was added
> within the last week). Did you recompile speeech dispatcher to have
> Pulse support? If not, you might be trying to use it through the ALSA
> plugin, which can create all sorts of wacky problems.
> As for OSS4, I wish it had lived up to what it could've been. The API
> is simpler, it's quick and responsive, and has a much better output
> routine than ALSA. Unfortunately, most of OSS4's drivers are buggy
> beyond belief, and USB microphones aren't supported at all. If you've
> got one of the cards which has a stable OSS driver and don't care
> about USB input, you can use it. I'm not so lucky, unfortunately, and
> all of the stable OSS4 cards have long since been discontinued.
> On 03/05/2011 09:05 AM, Steve Holmes wrote:
>> If GNOME3 is going exclusively pulse, that doesn't leave much
>> choice. I wasn't originally aware that espeak was maxing out the
>> volume in pulse; suppose that is the cause of our volume
>> instabilities then? Because at one point last week, I was in GNOME
>> and managed to have most other sounds going along pretty good
>> without distortion or crackling or any of that but it seemed that
>> as soon as I rebooted and brought up speech dispatcher then it all
>> went to hell and of course, speech dispatcher launches espeak; so
>> is that where the problem lies?
>> As for other sound alternatives, whatever happened to OSS4. I had
>> heard comments that it was even better than pulse. I notice that
>> none of the speech systems I know of implement OSS4 AFAIK.
>> On Sat, Mar 05, 2011 at 02:30:15PM +0000, Christopher Brannon
>> wrote:
>>> Jacob Schmude<j.schmude at>  writes:
>>>> Hi Arch's espeakup packages, just FYI, are using the git
>>>> version of espeakup with the direct ALSA option. I'd be all for
>>>> getting rid of it,
>>> No, they aren't. Look more closely at the PKGBUILD. How did you
>>> come to this conclusion? If you're trying to use the "device"
>>> setting in espeak's configuration files to redirect espeak's
>>> output to another sound card, it won't work, because of an espeak
>>> bug. The option wasn't being parsed correctly. AFAIK, it is
>>> fixed in the testing versions of espeak.
>>> -- Chris _______________________________________________ Speakup
>>> mailing list Speakup at
>> _______________________________________________ Speakup mailing
>> list Speakup at
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I have speech-dispatcher configured to use pulse. I'm using the default 
Arch package with version number 0.7.1-5. Apparently pulse support is 
compiled in this release. I get no errors regarding pulse or alsa from 
speech-dispatcher, it speaks correctly and if I kill pulseaudio I lose 
speech, all indicating that it is properly using the pulse interface.

 From playing around with pulse configurations, it seems that most of 
the trouble appears to come from resampling. For some reason, if I play 
a sound sampled at 16KHz while eSpeak is playing at 22.05KHz, everything 
distorts until the 16KHz sound stops playing. Seems it could be a bug on 
some cards, since this only seems to happen on my onboard ATI which is 
using the snd_hda_intel driver, and it doesn't happen on my soundblaster 
live value.

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