[wdmaudiodev] Re: Low-Latency & 24bit Output from User-Mode
- From: Chun-Yu <cshei@xxxxxxxxxxx>
- To: "'wdmaudiodev@xxxxxxxxxxxxx'" <wdmaudiodev@xxxxxxxxxxxxx>
- Date: Wed, 4 Sep 2002 12:13:52 -0500 (EST)
Hi,
I've been trying to to something similar to this. From what I've
gathered, you can either talk to the WDM device directly using IOCTLs or
you can use the ksProxy filter. Look for stuff about ksProxy in the MSDN
Library and the Windows DDK documentation. Also, play with the GraphEdit
program that comes with the Windows Platform SDK (try connecting stuff to
the WDM Streaming Devices). As far as I know, using WDM streaming
bypasses the kmixer (I think). If you are interested in working
on a simple
VST Host, I'd be interested in helping with it, since I'm also trying to
figure out this WDM streaming stuff.
Chun-Yu
On Wed, 4 Sep 2002, wdm wrote:
>
> Hi...
>
> although beeing subscribed to this mailing-list for some
> time now, I have not done much using sound-output yet.
>
> As I want to write a little VST-Host to be able to play
> some soft-synths without need for big programs like cubase
> etc and possibly no need for a soundcard with ASIO-support,
> I=B4d like to know if I can
>
> a.) send 24bit streams to the soundcard
> b.) have minimal latency <20 msec
>
> I read that the kmixer has an inherent latency of about
> 30 msec - is there any way I can circumvent this yet?
>
> Or will this be possible when Direct X 9 is released?
>
> Plattforms of choice are: W2K & XP
>
> Tobias
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