On Linux it's pacmd load-module module-loopback Last Halloween we hired a fortune teller and I used this with some ladspa plugins and my tts to rig up a s

On Linux it's pacmd load-module module-loopback Last Halloween we hired a fortune teller and I used this with some ladspa plugins and my tts to rig up a self signups from cellphone thing. When the fortune teller pressed the button the next in line was announced in a scary voice over the whole home audio system. After the music decreased in volume of course!