pulseaudio problems again

[Jeremy Whiting]

Hey all,

I hit this issue this evening a bit (have hit it off and on lately) so
I asked in #pulseaudio and got some suggestions. I first tried using
libao, but with that I got no speech at all. At any rate, it seems we
are asking for too small of a tlength in the bufferAttr we pass in to
pa_simple_new. The default in the code is 100, and it's taking a value
from the config also. default of 100. If I set it to something much
bigger like 4096, everything sounds fine (and pacmd list-input-sinks
shows the latency we are asking for as much longer than .50ms. I
gather that ideally we should calculate that from the sample itself.
I.e with a 30ms latency and a sample of 22050Hz (which I'm getting
here from espeak) * 0.03 seconds (30ms) * 1 channel * 2 bytes because
of the 16 bit sample we should be asking for 1324, not 100. If that
makes sense to everyone I'll put together a patch that does the
calculation based on the sample tomorrow.

thanks,
Jeremy

On Wed, Feb 25, 2015 at 3:02 PM, Micha? Zegan
<webczat_200 at poczta.onet.pl> wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> Hey.
>
> I have installed archlinux with pulse/speech-dispatcher compiled with
> libao, set libao as my default module, and set libao to use pulse.
> It seems that at the moment everything mostly works, like it still
> happens that there is a bad sound on login or on login screen, but it
> is far better, and for a very short period of time.
> After that, the sound of espeak is okay, unless someone overuses the
> cpu of course.
> On a side note, I am using teamtalk and when there are too many people
> then the effect is sometimes a little bit similar to the thing that
> happens on the beginning of the session so I am wondering if this is
> the same issue and what it actually is :O anyway libao seems to be
> better, so if you have this problem you can test it yourself to
> confirm if it's gone.
> -----BEGIN PGP SIGNATURE-----
> Version: GnuPG v2
>
> iQIcBAEBAgAGBQJU7kaNAAoJEHb1CzgxXKwYaQcP/RYW6YsAo0iIHbigj29zwxta
> hCns3hPH9E8E86lbm9vPRTSfyjIen0txJQxTKSNV2wZ7gMogwqtO4hLbVO5/Kvy1
> 06O899y+fRIudXlAqs1g2WKzQecLIDHCIewRRvUgzRtQoEiGKEPzenwnN5CRVBVP
> hNlP/IC0VvDs2jVCQB2HG7I6SsEI/WT9Y5uxPpPEakwRt8Zq/3YgdqnaLhBOknYq
> 3mt7NuRp1+8iJq3VDiMST0lfMa2R/ybqapdFruB21kMRvAPZwIxCgmmla9eNc7Jc
> 9MHbLvrdj9PcCYUmAHu7ZaTIH8JVJOVAPTTf3z2tTAL6uplQB3pmhtXs0vecegh6
> LntOGLsYIVyJHV5mQl2Mu5nXk9E7ac3GQHy+OeoDaQqo6bFrYkCaUABcqoiG4/4t
> PGSwAt7vglFUMBzymUx9l09Js5fChjrN++jKBXskXQrJnpQxnjVeWZ8e2QcyjktW
> V3b5OYvjJDxt6gSp1DWyf3knVLxZ/NPrVSkeXHuhOTTKvHWh8XjAtDLfoU3Jh3NM
> 7KPUBIZ8IrrPbapkqcCHIRV1GIPZwLUxpnkIK8rNFdSBjjiDf9ZIAH2llCEKBo7Y
> +hDzjXNoHxwpRcmZYTvZ6k4as50W7JoFIojkDIMdJ5s5MiYzfR2dqm0VKQSVBjtA
> HBNC/enTFTEGhusUSMdg
> =1SaG
> -----END PGP SIGNATURE-----
>
> _______________________________________________
> Speechd mailing list
> Speechd at lists.freebsoft.org
> http://lists.freebsoft.org/mailman/listinfo/speechd