It took me more than an hour to understand how everything is put together. And well, I still don't know everything, enough to do what I want anyway. There's nearly no information available on the net. The included script and the man-pages are cryptic.
Since the SB Live can be programmed to route input to ouput and define HW mixers for each of these mappings, it was the right choice for me.
So I have my speaker-set connected to the Front-plug, my stereo speakers to the Rear-plug. I have a Hauppauge TV card pluged to my Line-in-plug.
On my computer I have 2 different sound-sources. I use a program called snackAmp to play audio-files. It isn't capable of using esound. Which made me opt to use /dev/dsp1 for snackAmp. Esound by default uses /dev/dsp and I left esound to its default.
Opt. Spdif L
Opt. Spdif R
RCA Spdif L
RCA Spdif R
RCA Aux L
RCA Aux R
ADC Rec L
ADC Rec R
emu-dspmgr --clear --stop
emu-config -a -B on
emu-dspmgr -a"Analog L:Front L" -v"Analog L:Front L" -mline_l
emu-dspmgr -a"Analog R:Front R" -v"Analog R:Front R" -mline_r
emu-dspmgr -a"Pcm L:Front L" -v"Pcm L:Front L" -mline1_l
emu-dspmgr -a"Pcm R:Front R" -v"Pcm R:Front R" -mline1_r
emu-dspmgr -a"Pcm1 L:Front L" -v"Pcm1 L:Front L" -mline2_l
emu-dspmgr -a"Pcm1 R:Front R" -v"Pcm1 R:Front R" -mline2_r
emu-dspmgr -a"Pcm1 L:Rear L" -v"Pcm1 L:Rear L" -mline3_l
emu-dspmgr -a"Pcm1 R:Rear R" -v"Pcm1 R:Rear R" -mline3_r
emu-dspmgr -l"Pcm1" -f$DSPPATH/gain_2.bin
-a"fx8:Front R" \
-a"fx9:Front L" \
-a"fx10:Rear R" \
-a"fx11:Rear L" \