Hi!
It's couple weeks i try to figure out why AudioOutputExample don't produce sound.
At begining i tryed to uninstall PulseAudio to have only Alsa for direct access to sound card.
But too much troubles, loose the sound, too much dependencies to solve. So i reinstall pulseAudio, test alsamixer, and get back sound out from minijack output and laptop speakers...
Anyways, after this i also try call the function
pasuspender bash
to have direct acces to sound card (as suggested here)
it seems work because it cut the audio stream of a webpage if the browser is open,
and it suppress an error message like '..system busy' sended by AudioOutputExample
But nothing changed 
It seems RtAudio don't work properly on linux. Or should i try to install linux-rt has mentionned Arturo ?
Any ideas ?