Hi all!
My problem is: sound cards in my system do not redirect bass (low
frequencies) to a subwoofer. As a result satellite speakers work in
overload, sounds are distorted.
1.There are 2 sound cards in my PC:
cat /proc/asound/modules returns
0 snd_hda_intel it is an integrated ALC888
1 snd_emu10k1 it is Creative SBLive!,
acoustic system contains 4 satellites, 1 subwoofer (Microlab M800).
2.Used Kubuntu 10.04.
I try to resolve this problem:
3. Install blop and cmt by Synaptic.
4. create /etc/asound.conf file and then I paste to it 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 and right ...
1.2 0.5 # ... channel for 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 with 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"
}
}
A problem is: when I try to check sound in SystemSettings/Multimedia a
message displayed : "The device Upmix channel does not work", and sounds
played by snd_hda_intel. So this settings does not applyed to snd_emu10k1.
Where is my mistake? I should use Creative SBLive (snd_emu10k1).
Thank you in advance
--
Ronaldinho
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