Audio/sound line-in detection

[juky]

Hi all,

I have an audio device connected to my computer through line-in. At not
regular base the device send audio signal to the line-in. Now, what I
need to do is to write an application in VB.NET to monitor the line-in
and in the presence of analog signal I have to call some other
functions. How can detect it ? Any idea?

Thanks,
Juky

 

[alejandro lapeyre]

You have to record continuosly from that line.
You may do this with DirectX or with win32 api functions.(wave...)

When your program records you have to search the audio buffer for some
threshold level.

regards,
Alejandro Lapeyre


"juky" <[email protected]> escribió en el mensaje
Hi all,

I have an audio device connected to my computer through line-in. At not
regular base the device send audio signal to the line-in. Now, what I
need to do is to write an application in VB.NET to monitor the line-in
and in the presence of analog signal I have to call some other
functions. How can detect it ? Any idea?

Thanks,
Juky