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 CONFIDENTIALITY NOTICE: This e-mail transmission, and any documents, files or previous e-mail messages attached to it, may contain information that is confidential and/or legally privileged. If you are not the intended recipient, or a person responsible for delivering it to the intended recipient, please DO NOT disclose the contents to another person, store or copy the information in any medium, or use any of the information contained in or attached to this transmission for any purpose. If you have received this transmission in error, please immediately notify the sender by reply email or at mailto:privacy@xxxxxxxxxxxxxxx, and destroy the original transmission and its attachments without reading or saving in any manner.