[wdmaudiodev] Re: Anyone here worked with Windows CE?
- From: "Voelkel, Andy" <andy.voelkel@xxxxxxxxxxxxxxx>
- To: <wdmaudiodev@xxxxxxxxxxxxx>
- Date: Mon, 5 Mar 2007 15:04:12 -0800
I don't expect latency in the 1 mSec range. Even the converter filters
themselves introduce that much latency. My target would be in the 2.5
mSec range.
I have worked with Linux a bit - enough to scare me away. I know that
people are doing great things with Linux, but the learning curve is
unpleasant, due in no small part to the non-mainstream nature of Linux.
If I had a compelling financial reason to get over the Linux
tools-and-domain-knowledge hump, I'm sure I could get to satisfactory
result. But my primary job is to develop and implement algorithms. Also,
once I learned the necessary Linux stuff, I'd have to teach all my
coworkers.
- Andy
________________________________
From: wdmaudiodev-bounce@xxxxxxxxxxxxx
[mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx] On Behalf Of Evert van der
Poll
Sent: Saturday, March 03, 2007 7:16 AM
To: wdmaudiodev@xxxxxxxxxxxxx
Subject: [wdmaudiodev] Re: Anyone here worked with Windows CE?
Hi Andy,
What kind of latency figure would be acceptable in your scenario? I
don't think you will ever get it lower than 1 ms on XP.
Maybe, instead of going Windows CE, you could have a look at Linux.
There are some guys there doing good work. For example Ardour seems to
be making progress. I don't know what kind of latency figures you can
expect on that platform, but at least you have a lot of options to
tweak.
I am not speaking out of my own experience. It's just some things that I
read about it that grabbed my attention.
-Evert
-----Original Message-----
From: wdmaudiodev-bounce@xxxxxxxxxxxxx
[mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx]On Behalf Of Voelkel, Andy
Sent: Friday, March 02, 2007 11:25 PM
To: wdmaudiodev@xxxxxxxxxxxxx
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?
Thanks!
- Andy Voelkel
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