Weird problem with Sound card detecting

[Deng]

Hi

I got a problem with detecting sound card with Windows xp

I use SDK function waveInGetNumDevs() to test if there is a sound card. But even if there is no sound card installed, the function still returns 1. And even waveInGetDevCaps() returns no error. I checked device->hardware, and there are some items under "Audio, Vido and game" catogary, they includes :
"Legacy audio driver",
"Audio codecs"
"Media Control devices"
Guess there are some onboard Audio support, but no sound card installed.

SO how can I detect if there is a sound card installed or not? Can anyone help me?
Thanks

Deng

[TheCPUWizard]

You would have to iterate throught the installed devices to see if one meets your qualifications.

Really curious why you would care if it was a physical card as opposed to integrated support on the motherboard....

[Deng]

How to do the iterate? can you explain in more detail?

There is really no or not full sound support on motherboard.

I am trying to record waveform file by using mic. But when I tested it, it is strange that-- if no sound card is installed, it doen't show any fail information, But it will fail when I begin to record. So if something wrong with recording, I can't tell it is due to microphone or due to sound card

[lugangxyz]

try the mixerOpen() or mixerGetNumDevs(),goog luck

[Deng]

Originally posted by lugangxyz
try the mixerOpen() or mixerGetNumDevs(),goog luck

BIG THANKS!!!!
It works

[Deng]

Now comes another question:

Is mixerGetNumDevs() necessarily to judge if sound card or onboard sound support is installed. How it compares to waveInGetDevs()

Or is it depending on different systems? Coz in anothere system without sound card waveInGetDevs() returns 0

[lugangxyz]

sorry,i have not done that before