Thread: Configuring low-pass filter

good day all!
ask details setup speaker configuration (after reading article
"low-pass filter subwoofer channel (howto) benjamin eikel)

1. there 2 sound cards in pc:
cat /proc/asound/modules returns
0 snd_hda_intel
1 snd_emu10k1.
4 satellites, subwoofer

2. used kubuntu 10.04.

3.blop , cmt packeges installed synaptic.
4. /etc/asound.conf created , paste follow text:
pcm.upmix_20to51 {
type plug
slave.pcm lowpass_21to21
slave.channels 3
ttable {
0.0 1 # left channel
1.1 1 # right channel
0.2 0.5 # mix left , right ...
1.2 0.5 # ... channel subwoofer
}
}

pcm.lowpass_21to21 {
type ladspa
slave.pcm upmix_21to51
path "/usr/lib/ladspa"
channels 3
plugins {
0 {
id 1098 # identity (audio) (1098/identity_audio)
policy duplicate
input.bindings.0 "input";
output.bindings.0 "output";
}
1 {
id 1672 # 4 pole low-pass filter resonance (fcrcia) (1672/lp4pole_fcrcia_oa)
policy none
input.bindings.2 "input";
output.bindings.2 "output";
input {
controls [ 300 2 ]
}
}
}
}

pcm.upmix_21to51 {
type plug
slave.pcm surround51
slave.channels 5
ttable {
0.0 1 # front left
1.1 1 # front right
0.2 1 # rear left
1.3 1 # rear right
2.5 1 # subwoofer
}
hint {
show on
description "upmix channel"
}
}



problem is: when try check sound in systemsettings/multimedia message displayed : "the device upmix channel not work", , sounds playing snd_hda_intel. settings not applyed snd_emu10k1.

mistake? should use creative sblive (snd_emu10k1).
how can specify upmix channel applyed snd_emu10k1?

thank in advance --
ronaldinho

Forum The Ubuntu Forum Community Ubuntu Official Flavours Support Multimedia Software [kubuntu] Configuring low-pass filter

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