My experiment of using Mic and Line-In and Mic has been successful with INTEL motherboard.
Now, this makes me infer that INTEL is using two separate system buses for Mic and Line-In from the rear CPU jacks.
Anyone please help...
Is there no way I can use Line-In and Mic simultaneously ?
<<Could you go a little more in depth with how you are trying to use these dual inputs? >>
I am using the Microsoft API for speech-to-text transcrption.
Now, in Microsoft windows API, there is something called as "Token" for every object.
Likewise, Every audio capture device is an object and hence assigned a "Token" by the OS.
What I am doing is -
I search for the "Token" of the desired device.
Then assign the token for this device as an input to the speech API.
Now consider the following example-
-->I assign the "Token" for Mic as an input to ONE instance of Voice Recognizer.
-->I am getting the speech-to-text transcription smoothly.
-->Now I assign the "Token" for Line-In as an input to ANOTHER instance of the Voice Recognizer.
-->I find that assigning the "Token" for Line-In as an input to the Voice Recognizer itself gives an error.
I tried the same above three (first three) steps on a system with INTEL (details mentioned in previous post) motherboard and I could very well get the speech-to-text transcription smoothly for both the devices simultaneously.
Now, when I discussed the above issue with Microsoft people, they said that
"If the two devices have the same MUX, then both cannot be used simultaneously."
It were the aforesaid developments that led me to conclude that:-
"In ASUS P5KPL-AM IN motherboard, the Mic and Line-In at the rear CPU jacks share the same MUX"
"In INTELD945GCNL motherboard, the Mic and Line-In at the rear CPU jacks DO NOT share the same MUX"
Sorry if I made a mistake in understanding the Device Topology during all above developments.
If so, please clarify...