Hello, If I understand correctly, your four inputs and four outputs get mapped to two stereo inputs and two stereo outputs. If that is the case, you might want to look at module-remap-sink [1] four your outputs. I'm not sure if there is anything similar for sources/inputs, though, but you might be able to work around that using GStreamer's deinterleave plugin [2]. Best, ?tefan [1] http://www.freedesktop.org/wiki/Software/PulseAudio/Documentation/User/Modules#module-remap-sink [2] http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gst-plugins-good-plugins/html/gst-plugins-good-plugins-deinterleave.html