[wdmaudiodev] Re: Anyone here worked with Windows CE?

  • From: "Jerry Evans" <jerry@xxxxxxxxxxx>
  • To: <wdmaudiodev@xxxxxxxxxxxxx>
  • Date: Mon, 5 Mar 2007 23:44:16 -0000

Hi Andy,

Not sure about Vista yet. 

Another thought: See http://www.on-time.com/rttarget-32.htm (no affiliation). 
You'll still have to do some work if you have PCI kit. Using USB h/w however 
you can work directly with the isoch stream with a 1ms/125us frame time. The 
loader etc understands Win32 binaries so you can build/debug with VS 03/05.

Good luck!

----- Original Message ----- 
  From: Voelkel, Andy 
  To: wdmaudiodev@xxxxxxxxxxxxx 
  Sent: Monday, March 05, 2007 10:48 PM
  Subject: [wdmaudiodev] Re: Anyone here worked with Windows CE?

  Hi Jerry,


  I missed your second paragraph. I read about WaveRT drivers and Vista audio 
support. Maybe I missed something, but what I read seemed to indicate that 
Vista's audio enhancements would improve the average user experience with 
latency, but wouldn't provide a definitive advantage over a tuned Windows XP 
machine running ASIO drivers on PCI hardware. Am I wrong?


  - Andy



  From: wdmaudiodev-bounce@xxxxxxxxxxxxx 
[mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx] On Behalf Of Jerry Evans
  Sent: Sunday, March 04, 2007 6:33 AM
  To: wdmaudiodev@xxxxxxxxxxxxx
  Subject: [wdmaudiodev] Re: Anyone here worked with Windows CE?


  If good tools & v. low latency are the issue then consider OSX. PPC or Intel 
both have excellent prosumer hardware available plus Apple CoreAudio is very 
easy to use. You should be able to reliably work with 64 sample buffers.


  Or try Vista, a 25 buck Terratec soundcard and this BSD licensed driver: 
http://cmediadrivers.googlepages.com/. If WaveRT drivers and Vista CoreAudio 
live up to promise then you might get all you want. 


  Keep us posted!




  ----- Original Message ----- 

    From: Voelkel, Andy 

    To: wdmaudiodev@xxxxxxxxxxxxx 

    Sent: Friday, March 02, 2007 10:24 PM

    Subject: [wdmaudiodev] Anyone here worked with Windows CE?


    Hi all,

    Having just gone through another frustrating afternoon trying to reduce 
Windows audio latency, I am motivated once again to think of alternatives for 
real time audio algorithm development. I have a couple applications where a 
minimum 4.5 millisecond latency is just not attractive.

    I will probably have to use standalone DSP cards for development in order 
to avoid this problem, but the development tools on such boards just can't 
compare to Visual Studio.

    I have thought before of building a Windows CE target using a standard 
Pentium motherboard, and cross developing from a host Windows XP machine. I've 
heard that the Visual Studio tools for this sort of cross development are 
pretty good. I would imagine that Windows CE could be configured to have much 
lower latency than Windows XP.

    The problem is that the audio driver model is different, and I am afraid 
that finding a Windows CE driver for multichannel audio IO would be impossible, 
and that developing a driver myself would be very time consuming.

    Has this idea occurred to anyone else? Is it even feasible? Has anyone 
succeeded? Does anyone have opinions on related subjects?


    - Andy Voelkel

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