[orca-list] I hear Distorted Orca speech after login in 10.04

[Jacob Schmude]

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Hi
Well, all audio cards are AC97-based, mine just happens to say that in
the lspci output. You *do* have AC97 in your machines whether you know
it or not, as it's a standard audio codec.
You change the Pulseaudio resampling method in /etc/pulse/daemon.conf.
Change the line that reads:
resample-method = speex-float-1
to read:
resample-method = speex-float-3
Curiously, while Ubuntu's default is speex-float-1, a stock Pulseaudio
configuration defaults to speex-float-3. Alternatively, you can change
this parameter on a per-user basis by copying /etc/pulse/daemon.conf to
$HOME/.pulse/daemon.conf and editing that file instead.
One final thing, you say the cards are Creative Labs. Make sure they do
not use the emu10k1 driver if you're going to run Pulseaudio with them,
as they don't get along too well right now. If you will be using
emu10k1-based cards, such as the SB LIve or SB Audigy2, you'll almost
certainly want to disable Pulseaudio. You don't need it anyway,
emu10k1-based cards are some of the only ones still made that support
full hardware mixing and resampling without a sound server like
Pulseaudio helping them. If you experience a lot of audio latency,
you'll know you've come across this.

hth


On 04/21/2010 12:43 PM, hackingKK wrote:
> On Wednesday 21 April 2010 09:05 PM, Jacob Schmude wrote:
>> Yep, I can confirm this though it only happens on my netbook which has
>> the same soundcard your notebook does. It seems to be a resampling issue
>>    
> Hi jacob,
> I found this problen in Ubuntu beta 1 on my thinkpad r60.
> But just could not replicate in beta 2.
> I think this is an inconsistant but.
> 
> 
>> in Pulseaudio, changing Pulseaudio's resample method from speex-float-1
>> to speex-float-3 cleared it up for me. I suspect it's some sort of
>> resampling bug in the latest Pulseaudio when resampling quality is set
>> too low, or a perhaps a combination of resampling and buffering.
>>    
> Can you please tell me where to set this parameter, just in case I get
> this error on other machines?
> We are setting up a lab for blind people in another state in India and I
> don't want to have this problem surface there without a known solution.
> About 60 computers will be made available for job oriented trainning to
> the blind people.
> All those computers have some creative sound card, (I don't exactly know
> the specs though).
> 
>> Interestingly, I do not get this behavior on my desktop with the
>> integrated audio card on that machine. The card is:
>> 00:02.7 Multimedia audio controller: Silicon Integrated Systems [SiS]
>> AC'97 Sound Controller (rev a0)
>>
>>    
> 
> I have AC 97 in my laptop and it never gave problem.
> 
> Happy hacking.
> Krishnakant.
> 

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