echo "
anullsrc=cl=2[0:a],
[0:a]pan=5.1|FL=1*FL|FR=1*FR|FC=0.7071*FL+0.7071*FR|LFE=0.5*FL+0.5*FR|BL=-0.8718*FL+0.4898*FR|BR=0.4898*FR+-0.8718*FL[audio],
[audio]channelsplit=channel_layout=5.1[FL][FR][CTR][LFE][SL][SR],
[LFE]lowpass,
[CTR}highpass,
[FL][FR][CTR][LFE][SL][SR]join=inputs=6[joined],
[joined]anullsink
" | graph2dot