Hi there !
I'm trying to do biamplification (maybe triamplification) under Linux(FC6 x86_64) with ALSA and an Audigy 1 ES.
I tried the following configuration :
-- Low-pass filter --- rear speakers ---> /->-multi plugin \ -- High-pass filter -- front speakers --->
(the asoundrc is at the end of this mail)
I use aplay -Dbiamp test.wav to run a testI get no error message but my speakers emit no sound.aplay -v -v -Dbiamp test.wav does not give more help.
After investigation, it seems that the problem is between the multiplugin and the ladspa plugins but I have not been able to determine whatwas wrong. I have also tested each part individually and they seem towork. It is not due to a mixer settings as every output is set to max,neither it is due to a jack incorrectly plugged behind the soundcard.
Does anyone have tried to do something similar ?Does anyone see what I did wrong ?
Thanks
Frédéric Bisson
------ ~/.asoundrc -------------------------------------------------# generate a 4 channels stream from a 2 channels stream (stereo)pcm.biamp { type plug slave.pcm "bassmediumhigh" route_policy "duplicate"}
# create a fork with 2x2 channels stream from one 4 channels stream,# one stream for bass frequencies and# one stream for medium-high frequenciespcm.bassmediumhigh { type multi
slaves { a { pcm "copybass" channels 2 }
b { pcm "copymediumhigh" channels 2 } }
bindings [ { slave a channel 0 } { slave a channel 1 } { slave b channel 0 } { slave b channel 1 } ]}
# convert bass stream from multi to accomodate ladspa lpfpcm.copybass { type plug slave.pcm "bass" slave.format FLOAT_LE slave.rate 44100 slave.channels 2}
# convert medium-high stream from multi to accomodate ladspa hpfpcm.copymediumhigh { type plug slave.pcm "mediumhigh" slave.format FLOAT_LE slave.rate 44100 slave.channels 2}
# apply low-pass filter at 200 Hzpcm.bass { type ladspa slave.pcm "copyfront" path "/usr/lib64/ladspa" plugins [ { label lpf input { controls [ 200 ] } } ]}
# apply high-pass filter at 200 Hzpcm.mediumhigh { type ladspa slave.pcm "copyrear" path "/usr/lib64/ladspa" plugins [ { label hpf input { controls [ 200 ] } } ]}
# send bass stream to front speakers# front is system definedpcm.copyfront { type plug slave.pcm "front"}
# send medium-high stream to rear speakers# rear is system definedpcm.copyrear { type plug slave.pcm "rear"}
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