hello all, I do have to use winXP as one of the requirements is ease of use and they told me that using a boot disk or something else is not what they want. Also, I have to control a translation table from within the control program (the user interface), and that's only possible in windows. Thank you for all the inputs, I will consider them. Also there's one thing that seemed to be an option, but I don't know if it's possible: could I write a customDPC that processes each sample and writes it immediatly back to the line-out AND to a dedicated buffer (so i can acess the value from an user interface)? I'm not good aware of the possibilities of a DPC, but it seems to me that it stands the closest to the hardware. But maybe this isn't correct. Anyway thank you for all the idea's, you all helped me a lot already. Pieterjan ****************** WDMAUDIODEV addresses: Post message: mailto:wdmaudiodev@xxxxxxxxxxxxx Subscribe: mailto:wdmaudiodev-request@xxxxxxxxxxxxx?subject=subscribe Unsubscribe: mailto:wdmaudiodev-request@xxxxxxxxxxxxx?subject=unsubscribe Moderator: mailto:wdmaudiodev-moderators@xxxxxxxxxxxxx URL to WDMAUDIODEV page: http://www.wdmaudiodev.de/