делаю так:
load-module module-combine-sink sink_name=combined slaves=alsa_output.pci-0000_00_1b.0.analog-stereo,alsa_output.pci-0000_05_02.0.analog-stereo
Pavucontrol:
http://i.imgur.com/kiQasFZ.png
Pulseaudio 9.0, archlinux
делаю так:
load-module module-combine-sink sink_name=combined slaves=alsa_output.pci-0000_00_1b.0.analog-stereo,alsa_output.pci-0000_05_02.0.analog-stereo