[wdmaudiodev] Digital Audio Loop Back deivce/driver
- From: "Alex Rosenbaum" <alex_rosenbaum@xxxxxxxxxxx>
- To: <wdmaudiodev@xxxxxxxxxxxxx>
- Date: Fri, 18 Feb 2005 14:45:29 -0700
Hello,
I've just start working with WDM.
I am trying to implement a virtual audio device and can loop all WaveOut
audio to the WaveIn on a Win XP and 2K OS. Something similar to the VAC
(Virtual Audio Cables).
This is good for recording from other application or playing wave files in
to some application.
I started by taking the MSVAD Simple and replacing the savedata.cpp with my
own loopdata.cpp.
After some playing around it even started to work.
So the questions:
1) Now I want to have several of these instances in the "Control Panel" ->
"Sound and Audio Devices" -> Audio tab -> "Sound Playback" and "Sound
Recording".
- What do I need to do?
- Multiple inf files? Multiple interfaces in the inf file? Couldn't figure
that out.
2) In VAC I think he implemented an upper-layer filter or something like
that.
- How do I get started with user-mode drivers/devices?
- Any reference code for audio user-mode dll?
- What can it offer me?
3) If I stick with the WDM MSVAD sample, do I have to get a cat file from
MHQL for smooth installtion?
- Is there any way of installing drivers without the cat file and the popup
warning?
If you have a good reference for a "virtual audio loop device" that has
multiple appearances in the Sound Playback, please email me some
information.
Thank you,
Alex Rosenbaum
SAM - Answering Machine for Skype users
http://www.freewebs.com/skypeansweringmachine/
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