Hi!
After I finally switched from that CMI3738 card to Intel HD Audio (a
SigmaTel chip) I have another quite interesting problem:
As the bass of the Intel HDA is a bit weak, I tried applying a LADSPA
equalizer filter on it. After I spent most of the day to get that
working I now have a problem:
When playing a wave file (stereo) with aplay --> equalizer works
absolutely fine.
When playing a movie with 5.1 sound using mplayer --> sound is
crackling, like it can't be played fast enough, or like when you ffwd
through a dvd. Something like that.
When playing the mentioned wave file with mplayer --> equalizer works
fine.
Is this ALSA's way to tell me that using that equalizer is not a good
idea, or am I doing something wrong?
My asound.conf looks like this:
----
pcm.ladspa {
type ladspa
slave.pcm "plughw:0,0";
path "/usr/lib/ladspa";
channels 6
plugins
[
{
label dj_eq
id 1901
filename "/usr/lib/ladspa/dj_eq_1901.so"
input {
controls [ 0 0 0 ]
}
}
]
}
pcm.!default {
type plug
slave.pcm "ladspa";
}
pcm.!surround51 {
type plug
slave.pcm "ladspa";
}
----
The same thing happens when I use another plugin out of Steve Hariss'
collection (tried with vynil).
My worst fear is, that I have done nothing wrong and these plug-ins are
simply not capable of coping with multichannel audio. But why are the
additional 4 channels not just discarded, but the sound completely
distorted?
Thanks in advance for any help,
Best wishes and a merry christmas to you all!
Sebastian Schäfer
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