Hi @nraj, thanks for the post.
The reason passing “Same as System” into this method doesn’t work is because this is functionality that is built into the default meeting UI. There is no audio input device on your machine with the name “Same as System”, unless you have explicitly named a device as such.
In order to achieve this behavior programmatically, you would need to find your system’s currently selected audio input and enter the name of that device into the method referenced in your post.
Thanks!