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Upmixing stereo to 4.1 for PulseAudio
pactl load-module module-alsa-sink device=hw:Device channel_map=rear-left,rear-right,rear-center,subwoofer,front-right,front-left
pactl load-module module-remap-sink sink_name=surround remix=yes master=alsa_output.hw_Device channels=6 master_channel_map=front-right,front-left,rear-left,rear-right,lfe,lfe channel_map=front-left,front-right,front-left,front-right,front-left,front-right
pactl set-default-sink surround
pactl load-module module-loopback latency_msec=1
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