[wdmaudiodev] Re: White Papers now available
- From: "Amar Kumar" <akumar@xxxxxxxxxxxx>
- To: <wdmaudiodev@xxxxxxxxxxxxx>
- Date: Mon, 9 Dec 2002 10:17:07 +0530
Hi,
Can anyone tell me from where i can get white papers ....i could not find it
may be because I have not got that mail ...may be missed that mail ...
Thanks for ur help iin advance...
Thanks,
Amar Kumar.
-----Original Message-----
From: wdmaudiodev-bounce@xxxxxxxxxxxxx
[mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx]On Behalf Of Mike Garrett
Sent: Sunday, December 08, 2002 12:27 AM
To: wdmaudiodev@xxxxxxxxxxxxx
Subject: [wdmaudiodev] Re: White Papers now available
Hello Alejandro (and Michel),
The problem with KMixer is not just latency but also sample rate
conversion, bit depth stuff, etc. For Pro Audio, you have to be
confident that the bits at the sound card converters are 100% identical
to what the application software sent to the kernel (e.g. so you can
pass the "180% out of phase = silence" test.)
Mike Garrett
-----Original Message-----
From: wdmaudiodev-bounce@xxxxxxxxxxxxx
[mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx] On Behalf Of Michel Jullian
Sent: Friday, December 06, 2002 7:36 AM
To: wdmaudiodev@xxxxxxxxxxxxx
Subject: [wdmaudiodev] Re: White Papers now available
Hi Alejandro,
Er...I feel a bit foolish making such an obvious suggestion...
Why don't you lower KMixer latency from the ridiculous present 30 ms to
say one or two ms (this could be a user preference -with a default value
of 30 ms if you must-, or could even be set automatically depending on
hardware performance)?
The performance hit due to overhead of calling the corresponding routine
more often would go totally undetected IMHO.
This way nobody would have to monopolize the audio hardware, or to fool
around with other APIs than the standard ones : it's quite simple to get
acceptable (< 10ms) output latency using DirectSound on Win98SE/ME, it's
a bit silly to get exactly 30ms more on more modern OSes (with
notoriously better scheduling moreover!)
What am I missing ?
Yours,
Michel
--
Michel Jullian
Exbang Industries/Sequensys
Alejandro Goyen wrote:
>
> A pleasure to meet you all. My name is Alejandro Goyen, Core Audio
> Program Manager at Microsoft.
>
> The low latency platform is open for discussion and I would be pleased
> to hear about your requirements.
>
> Thanks, Alejandro.
>
> Alejandro Goyen
> Core Audio Program Manager
> Microsoft Corporation
>
> _________________________________________________________________
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