Hi, I did this by inserting an upper filter for sysaudio.sys. You dont need audio driver sample for this. You can take one filter driver sample and add KS IOCTL to it. This approach is working with 2K/98. not tried in XP.. best regards Shanavas.K.S NeST India -----Original Message----- From: raza@xxxxxxxxx To: wdmaudiodev@xxxxxxxxxxxxx Sent: 4/18/04 10:44 PM Subject: [wdmaudiodev] Virtual audio driver Hi, I want to reocord/spy all the outgoing system sound to a file,in order to implement such a spy i have learned that i need to write a virtual audio driver that inserts itself into stack of audio drivers and just pass the data it receives to lower driver along with writing it to file. Where will this virtual driver be inserted in the stack ? There are class/mini class drivers , port/miniport driver. Where to fit my filter in this stack and how ? Is there any sample i can look at ? There is MSVAD in XPDDK but its implementing a miniport driver serving as an example for driver writer to write audio drivers but not an example of a filter driver that gets inserted in the stack. any help would be highly appreciated. Regards Raza ****************** 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/ ****************** 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/
