Different applications, different sound output devices

Solution 1:

It is going to vary with hardware and my guess is that you need 2 separate sound cards or a sound card / mixer capable of such separation.

You can then configure pulseausio to send output to specific locations / cards with pavucontrol , in the playback tab

One may need to install pavucontrol , either with apt-get or from the software center.

sudo apt-get install pavucontrol

If for some reason, pulseaudio will not do this, jack will, but configuring jack can be overwhelming. If you are new to jack, I suggest Cadence, with is a graphical tool provided as a binary

http://kxstudio.sourceforge.net/Downloads