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pacmd unload-module module-loopbacksource: [http://www.linuxquestions.org/questions/linux-software-2/alsa-and-pulseaudio-recording-multiple-input-devices-877614/ jthill on linuxquestions.org]It would be better to specify which interfaces to mix specifically rather than just mixing them all. pactl load-module module-loopback source="alsa_input.usb-PLEXTOR_Plextor_ConvertX_M402U-00-PXM402.analog-stereo" sink="alsa_output.pci-0000_00_08.0.analog-stereo"I couldn't get this to work. When I do I will come back here and correct the error. moving on...Q: How do I know what to specify for the source, what is the exact correct text string?A: I found it by using "pacmd list-sources". There is a lot of information, it would help to narrow it down: pacmd list-sources |grep M402UAnother cool way to narrow down the information for any capture device and to show inputs and outputs... pacmd list-sources | sed -nr '/^ |\tname:/H;${g;s/\n\t/\t/g;s/\n//p}' See also: * [https://wiki.archlinux.org/index.php/PulseAudio/Examples PulseAudio/Examples] * [http://www.freedesktop.org/wiki/Software/PulseAudio/FAQ/#index39h3 freedesktop.org PulseAudio FAQ] - a guide that was never very verbose and notably incomplete.