I would like to know if this is possible.

I have a laptop which has support for sound based on internal speakers. So, that works.

When I want to forward that sound into the living room amplifier sound system, I plug the Analog Jack into the laptop and I have the sound redirected to the living room amplifier sound system. So, that works.

However, when the sound is redirected, it no longer plays on the laptop internal speakers. Would there be a way to enable/disable the local audio support on request from Windows so I wouldn't have to unplug/plug that cable?