[mythtv-users] spdif & digital sound error

Fri Jul 7 14:13:08 UTC 2006

Okay,
I found this online, and I know it says to tweak it, but i'm not sure how to
do that.  i can watch HDTV no problem using my hd3000 card, but the sound is
nothing but static.  Now I can hear music and tv fine over the analog
output, but no sound via spdif output both are from onboard audio. This
first part is what I get when i run aplay -l.  I've read of other people
having the same problem...but i can't seem to fix mine.

**** List of PLAYBACK Hardware Devices ****
ALSA lib conf.c:1178:(parse_def) iec958 is not a compound
ALSA lib conf.c:1591:(snd_config_load1) _toplevel_:1:12:Invalid argument
ALSA lib conf.c:2836:(snd_config_hook_load) /home/mythtv/.asoundrc may be
old or corrupted: consider to remove or fix it
ALSA lib conf.c:2699:(snd_config_hooks_call) function snd_config_hook_load
returned error: Invalid argument
ALSA lib conf.c:3065:(snd_config_update_r) hooks failed, removing
configuration
aplay: device_list:231: control open (0): Invalid argument
[mythtv at localhost ~]$

# ~/.asoundrc or /etc/asound.conf
# ALSA configuration file

##### USAGE #####
# Save this file as "~/.asoundrc" (for user-specific sound configuration) or
# "/etc/asound.conf" (for system-wide sound configuration) and specify ALSA
# device names ad described in the next section.

##### DEVICE NAMES #####
# This configuration file defines four devices for use by the user.  Those
# devices are "analog", "mixed-analog", "digital", and "mixed-digital".  The
# user may also re-define "default" to be identical to one of the
above-named
# devices ( i.e. to send all sound output to the digital output unless
otherwise
# specified).  Use the device names as described below:
#  - "analog" outputs to the analog output directly and (at least on
software
#  sound cards) blocks other audio output.  After playback completes,
"queued"
#  sounds are output in sequence.
#  - "mixed-analog" mixes audio output from multiple programs into the
analog
#  output (so you can hear beeps, alerts, and other noises while playing
back
#  an audio stream).
#  - "digital" outputs to the digital output directly.  Since most (all?)
#  digital outputs expect 48kHz PCM audio, this may not work for some
playback
#  (i.e. CD's--which are 44.1kHz PCM audio--or 32kHz audio streams from TV
#  recordings, etc.).
#  - "mixed-digital"

# All other devices created within this file are used only by the
configuration
# file itself and should /not/ be used directly.  In other words, do not use

# the devices "analog-hw", "dmix-analog", "digital-hw", or "dmix-digital".

##### IMPORTANT #####
# To make this ALSA configuration file work with your sound card, you will
need
# to define the appropriate card and device information for the "analog-hw"
and
# "digital-hw" devices below.  You can find the card and device information
# using "aplay -l".

##### Configuration File #####

# Override the default output used by ALSA.  If you do not override the
# default, your default device is identical to the (unmixed) "analog" device
# shown below.  If you prefer mixed and/or digital output, uncomment the
# appropriate four lines below (only one slave.pcm line).
#
# Note, also, that as of ALSA 1.0.9, "software" sound cards have been
modified
# such that their default "default" device is identical to the
"mixed-analog"
# device.  Whether using an ALSA version before or after 1.0.9, it does no
harm
# and has no affect on performance to redefine the device (even if the
# redefinition does not change anything).  Also, by using this ALSA
# configuration file, you once again have access to unmixed analog output
using
# the "analog" device.
pcm.!default {
  type plug
## Uncomment the following to use "mixed-analog" by default
#  slave.pcm "dmix-analog"
## Uncomment the following to use (unmixed) "digital" by default
  slave.pcm "digital-hw"
## Uncomment the following to use "mixed-digital" by default
#  slave.pcm "dmix-digital"
}

# Control device (mixer, etc.) for the card
ctl.!default {
  type hw
  card 0
}

# Alias for (converted) analog output on the card
# - This is identical to the device named "default"--which always exists and

# refers to hw:0,0 (unless overridden)
# - Therefore, we can specify "hw:0,0", "default", or "analog" to access
analog
# output on the card
# - Note that as of ALSA 1.0.9, "software" sound card definitions redefine
# "default" to do mixing, meaning this device is different from "default"
and
# allows playback while blocking other sound sources (until playback
# completes).
pcm.analog {
  type plug
  slave.pcm "analog-hw"
}

# Control device (mixer, etc.) for the card
ctl.analog {
  type hw
  card 0
}

# Alias for (converted) mixed analog output on the card
# - This will accept audio input--regardless of rate--and convert to the
rate
# required for the dmix plugin (in this case 48000Hz)
# - Note that as of ALSA 1.0.9, "software" sound card definitions redefine
# "default" to do mixing, meaning this device is identical to "default" for
# "software" sound cards.
pcm.mixed-analog {
  type plug
  slave.pcm "dmix-analog"
}

# Control device (mixer, etc.) for the card
ctl.mixed-analog {
  type hw
  card 0
}

# Alias for (converted) digital (S/PDIF) output on the card
# - This will accept audio input--regardless of rate--and convert to the
rate
# required for the S/PDIF hardware (in this case 48000Hz)
pcm.digital {
  type plug
  slave.pcm "digital-hw"
}

# Control device (mixer, etc.) for the card
ctl.digital {
  type hw
  card 0
  device 2
}

# Alias for mixed (converted) digital (S/PDIF) output on the card
#  - This will accept audio input--regardless of rate--and convert to the
rate
#  required for the S/PDIF hardware (in this case 48000Hz)
pcm.mixed-digital {
  type plug
  slave.pcm "dmix-digital"
}

# Control device (mixer, etc.) for the card
ctl.mixed-digital {
  type hw
  card 0
  device 2
}

# The following devices are not useful by themselves.  They require specific
# rates, channels, and formats.  Therefore, you probably do not want to use
# them directly.  Instead use of of the devices defined above.

# Alias for analog output on the card
# Do not use this directly--it requires specific rate, channels, and format
pcm.analog-hw {
  type hw
  card 0
  # The default value for device is 0, so no need to specify
#  - Uncomment one of the below or create a new "device N" line as
appropriate
#    for your sound card or
#  device 1
#  device 4
}

# Control device (mixer, etc.) for the card
ctl.analog-hw {
  type hw
  card 0
}

# Alias for digital (S/PDIF) output on the card
# Do not use this directly--it requires specific rate, channels, and format
pcm.digital-hw {
  type hw
  card 0
  device 1
#  - Comment out "device 1" above and uncomment one of the below or create a
#    new "device N" line as appropriate for your sound card or
#  device 2
#  device 4
}

# Control device (mixer, etc.) for the card
ctl.digital-hw {
  type hw
  card 0
}

# Direct software mixing plugin for analog output on the card
# Do not use this directly--it requires specific rate, channels, and format
pcm.dmix-analog {
  type dmix
  ipc_key 1234
  slave {
    pcm "analog-hw"
    period_time 0
    period_size 1024
    buffer_size 4096
    rate 48000
  }
}

# Control device (mixer, etc.) for the card
ctl.dmix-analog {
  type hw
  card 0
}

# Direct software mixing plugin for digital (S/PDIF) output on the card
# Do not use this directly--it requires specific rate, channels, and format
pcm.dmix-digital {
  type dmix
  ipc_key 1235
  slave {
    pcm "digital-hw"
    period_time 0
    period_size 1024
    buffer_size 4096
    rate 48000
  }
}

# Control device (mixer, etc.) for the card
ctl.dmix-digital {
  type hw
  card 0
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