I have a PC with builtin soundcard, and it has one output for the speakers (behind the computer) and one for the headphones (on the front side).
When I play something, the sound goes to both outputs.
I'd like to have the two devices detected separately, so I can choose which of them should play what.
In KMix I can disable the speakers (shown as Front) and the headphones separately.
However, in the applications' audio settings, all the devices available either play on both or none of them.
My OS is PCLinuxos, using ALSA as sound server.
Here's my alsa-info output.