Hi everyone I've been stumped on that for a few months now and can't figure it out anymore. What I am trying to do is separate front left/right, center left/right and back left/right into separate stereo channels. Oddly, this used to work until I reinstalled Kubuntu a few months ago (failed HD). Now it fails in a strange way. I have and use three outputs: ALC889 built-in sound chip, using the analog 7.1 outputs HDMI via nVidia GPU (HDMI outputs not always connected) Bluetooth Headset on-demand (i.e. not always connected) I've added these lines to the end of /etc/pulse/default.pa, everything else is completely default: # Split outputs and add echo cancellation service load-module module-remap-sink sink_name=earphones sink_properties=device.description="Earphones" remix=no master=alsa_output.pci-0000_00_14.2.analog-surround-71 channels=2 master_channel_map=side-left,side-right channel_map=front-left,front-right load-module module-remap-sink sink_name=headset sink_properties=device.description="Headset" remix=no master=alsa_output.pci-0000_00_14.2.analog-surround-71 channels=2 master_channel_map=rear-left,rear-right channel_map=front-left,front-right load-module module-remap-sink sink_name=speakers sink_properties=device.description="Speakers" remix=no master=alsa_output.pci-0000_00_14.2.analog-surround-71 channels=2 master_channel_map=front-left,front-right channel_map=front-left,front-right load-module module-echo-cancel And that's where it gets odd. The "earphones" and "speakers" sinks work. The "headset" sink does not, it's silent even though it does show up as output in both pacmd list-sinks and in the KDE mixer. The weird thing: If i go directly to the soundcard sink, I can play sounds on all channels - separately or simultaneously. And of course, this worked before, why doesn't it work now? What am I missing? 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