Googling on subject, only two solutions raising : to use sound server as jack or pulseaudio, or turn on hardware switch responsible for that. Since I want to insert few ladspa plugins between in and out, jack is less or more acceptable. But more less than more.
Anyway, first coming in mind to solve this is to make plug or directly ladspa slave of hw device . I've tried that with no result, but restarting alsa show no errors, so is such configuration meaningful? Another way looking potential, is to use file plugin, something like this:
$mkfifo -m 777 /tmp/mic
pcm.mictf {
type file
slave.pcm mmic #dsnoop
file /tmp/mic
}
pcm.micff {
type file
slave.pcm add #plug
infile /tmp/mic
}
Trying with no result, no config errors again. And I don't think it would be much faster than arecord | aplay chain, please correct me, if I'm wrong.
Here's my asond.conf
pcm.virtual_4ch_hw {
type dmix
ipc_key 2048
ipc_key_add_uid true
slave {
pcm hw:0
channels 4
rate 48000
format S16_LE
period_size 128
buffer_size 2048
}
}
#mpd default
pcm.mpd-front {
type plug
slave.pcm virtual_4ch_hw
# slave.channels 2
}
#mpd 2nd
pcm.mpd-rear {
type plug
slave.pcm virtual_4ch_hw
# slave.channels 2
ttable.0.2 1
ttable.1.3 1
}
#pulse
pcm.pulse_dev {
type plug
slave {
pcm virtual_4ch_hw
# channels 4
}
}
#additional
pcm.add {
type plug
slave.pcm virtual_4ch_hw
}
pcm.jacko {
type plug
slave.pcm virtual_4ch_hw
slave.channels 2
}
ctl.jacko {
type hw
card 0
}
ctl.virtual_4ch_hw {
type hw
card 0
}
pcm.mmic {
type dsnoop
ipc_key 234884
slave {
pcm "hw:0"
channels 2
rate 48000
format S16_LE
period_size 128
buffer_size 2048
}
}
pcm.pulse-mic {
type plug
slave {
pcm mmic
}
}
Any help, or maybe working config are welcome.
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