Get one application audio?

[SupertigerDev]

Is there anyway to get a single application audio? For example only capture a game but nothing else. It can be done using wasapi but I don't know how.

[almoghamdani]

This library is a wrapper around RtAudio which allows to capture from input devices.
It doesn't allow to capture from a single application AFAIK.
If RtAudio supports this, please let me know and I'll add the appropriate feature.