Brauche Hilfe bei 5.1 config (asound details, routing, mixing, lowpass und phonon)

# 2008-11-15
#
# This .asoundrc will allow the following:
#
# - upmix stereo files to 5.1 speakers.
# - playback real 5.1 sounds, on 5.1 speakers,
# - allow the playback of both stere(oupmixed) and surround(5.1) sources at the same time.
# - use the 6th and 7th channel (side speakers) as a separate soundcard, i.e. for headphones
# (This is called the "alternate" output throughout the file, device names prefixed with 'a')
# - play mono sources in stereo (like skype & ekiga) on the alterate output


# Make sure you have "8 Channels" and NOT "6 Channels" selected in alsamixer!
#
# Please try the following commands, to make sure everything is working as it should.
#
# To test stereo upmix : speaker-test -c2 -Ddefault -twav
# To test surround(5.1): speaker-test -c6 -Dplug:dmix6 -twav
# To test alternative output: speaker-test -c2 -Daduplex -twav
# To test mono upmix: speaker-test -c1 -Dmonoduplex -twav
#
#
# It may not work out of the box for all cards. If it doesnt work for you, read the comments throughout the file.
# The basis of this file was written by wishie of #alsa, and then modified with info from various sources by
# squisher.


#Define the soundcard to use
pcm.snd_card {
type hw
card 0
device 0
}


# 8 channel dmix - output whatever audio, to all 8 speakers
pcm.dmix8 {
type dmix
ipc_key 1024
ipc_key_add_uid false
ipc_perm 0660
slave {
pcm "snd_card"
rate 192000
channels 8
period_time 0
period_size 1024
buffer_time 0
buffer_size 5120
}




# Some cards, like the "nforce" variants require the following to be uncommented. It routes the audio to t he correct speakers.
#bindings {
#0 0
#1 1
#2 4
#3 5
#4 2
#5 3
#6 6
#7 7
#}
}


# upmixing - duplicate stereo data to all 6 channels
pcm.ch51dup {
type route
slave.pcm dmix8
slave.channels 8
ttable.0.0 1
ttable.1.1 1
ttable.0.2 1
ttable.1.3 1
ttable.0.4 0.5
ttable.1.4 0.5
ttable.0.5 0.5
ttable.1.5 0.5
}


pcm.lowpass_20to51 {
    type ladspa
    slave.pcm ch51dup
    path "/usr/lib64/ladspa"
    channels 6
    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.5 "Input";
            output.bindings.5 "Output";
            input {
                controls [ 300 5 ]
            }
        }
    }
}




# this creates a six channel soundcard
# and outputs to the eight channel one
# i.e. for usage in mplayer I had to define in ~/.mplayer/config:
# ao=alsa:device=dmix6
# channels=6
pcm.dmix6 {
type route
slave.pcm dmix8
slave.channels 8
ttable.0.0 1
ttable.1.1 1
ttable.2.2 1
ttable.3.3 1
ttable.4.4 1
ttable.5.5 1
}




# share the microphone, i.e. because virtualbox grabs it by default
pcm.microphone {
type dsnoop
ipc_key 1027
slave {
pcm "snd_card"
}
}


# rate conversion, needed i.e. for wine
pcm.2chplug {
type plug
slave.pcm "ch51dup"
}
pcm.a2chplug {
type plug
slave.pcm "dmix8"
}




# routes the channel for the alternative
# 2 channel output, which becomes the 7th and 8th channel
# on the real soundcard
pcm.alt2ch {
type route
slave.pcm "a2chplug"
slave.channels 8
ttable.0.6 1
ttable.1.7 1
}


# skype and ekiga are only mono, so route left channel to the right channel
# note: this gets routed to the alternative 2 channels
pcm.mono_playback {
type route
slave.pcm "a2chplug"
slave.channels 8
# Send Skype channel 0 to the L and R speakers at full volume
ttable.0.6 1
ttable.0.7 1
}


# 'full-duplex' device for use with aoss
pcm.duplex {
type asym
playback.pcm "2chplug"
capture.pcm "microphone"
}




pcm.aduplex {
type asym
playback.pcm "alt2ch"
capture.pcm "microphone"
}




pcm.monoduplex {
type asym
playback.pcm "mono_playback"
capture.pcm "microphone"
}




# for aoss
pcm.dsp0 "duplex"
ctl.mixer0 "duplex"


# softvol manages volume in alsa
# i.e. wine likes this
pcm.mainvol {
type softvol
slave.pcm "duplex"
control {
name "2ch-Upmix Master"
card 0
}
}




#pcm.!default "mainvol"


# set the default device according to the environment
# variable ALSA_DEFAULT_PCM and default to mainvol
pcm.!default {
@func refer
name { @func concat
strings [ "pcm."
{ @func getenv
vars [ ALSA_DEFAULT_PCM ]
default "mainvol"
}
]
}
}






# uncomment the following if you want to be able to control
# the mixer device through environment variables as well
#ctl.!default {
# @func refer
# name { @func concat
# strings [ "ctl."
# { @func getenv
# vars [ ALSA_DEFAULT_CTL
# ALSA_DEFAULT_PCM
# ]
# default "duplex"
# }
# ]
# }
#}