Alright! First, I had lots of trouble getting named PCMs to be used, until I found the key. Address them with "alsa" -- "alsa:digital", and reboot after all the changes I made to the configuration.
That said, I was really driven to find a way to have multiple audio outputs -- the HDMI for the television itself, the USB headset, and (hey, why not?) the stereo jack on the Revo.
I basically attached what I learned from pumkinut (who I greatly thank for putting me on the right path), to this
fully built out configuration from liamf. And it all works!
My configuration:
Code:
# ~/.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".
# 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"
hint {
show on
description "Analog Output - Use analog outputs, converting samples, format, and rate as necessary."
}
}
# 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"
hint {
show on
description "Mixed Analog Output - Use analog outputs, converting samples, format, and rate as necessary. Allows mixing with system sounds."
}
}
# Control device (mixer, etc.) for the card
ctl.mixed-analog {
type hw
card 0
}
# Alias for (converted) digital (HDMI) output on the card
pcm.digital {
type plug
slave.pcm "digital-hw"
hint {
show on
description "Digital Output - Use digital outputs, converting samples, format, and rate as necessary."
}
}
# Control device (mixer, etc.) for the card
ctl.digital {
type hw
card 0
}
# Alias for mixed (converted) digital (HDMI) output on the card
pcm.mixed-digital {
type plug
slave.pcm "dmix-digital"
hint {
show on
description "Mixed Digital Output - Use digital outputs, converting samples, format, and rate as necessary. Allows mixing with system sounds."
}
}
# Control device (mixer, etc.) for the card
ctl.mixed-digital {
type hw
card 0
}
# Alias for (converted) USB output on the card
pcm.usb {
type plug
slave.pcm "usb-hw"
hint {
show on
description "USB Output - Use USB outputs, converting samples, format, and rate as necessary."
}
}
# Control device (mixer, etc.) for the card
ctl.usb {
type hw
card 0
}
# Alias for mixed (converted) digital (HDMI) output on the card
pcm.mixed-usb {
type plug
slave.pcm "dmix-usb"
hint {
show on
description "Mixed USB Output - Use USB outputs, converting samples, format, and rate as necessary. Allows mixing with system sounds."
}
}
# Control device (mixer, etc.) for the card
ctl.mixed-usb {
type hw
card 0
}
# 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
device 0
}
# Control device (mixer, etc.) for the card
ctl.analog-hw {
type hw
card 0
}
# Alias for digital (HDMI) output on the card
# Do not use this directly--it requires specific rate, channels, and format
pcm.digital-hw {
type hw
card 0
device 3
}
# Control device (mixer, etc.) for the card
ctl.digital-hw {
type hw
card 0
}
# Alias for USB output on the card
# Do not use this directly--it requires specific rate, channels, and format
pcm.usb-hw {
type hw
card 1
device 0
}
# Control device (mixer, etc.) for the card
ctl.usb-hw {
type hw
card 1
}
# 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
}
# Direct software mixing plugin for USB output on the card
# Do not use this directly--it requires specific rate, channels, and format
pcm.dmix-usb {
type dmix
ipc_key 4321
slave {
pcm "usb-hw"
period_time 0
period_size 1024
buffer_size 4096
rate 48000
}
}
# Control device (mixer, etc.) for the card
ctl.dmix-usb {
type hw
card 1
}
# Make joint analog/HDMI the default
pcm.!default {
type plug
slave {
pcm multi
rate 48000
}
ttable.0.0 1.0
ttable.1.1 1.0
ttable.0.2 1.0
ttable.1.3 1.0
ttable.0.4 1.0
ttable.1.5 1.0
}
# Control device (mixer, etc.) for the card
ctl.!default {
type hw
card 0
}
pcm.xbmc {
type plug
slave {
pcm multi
rate 48000
channels 4
}
ttable.0.0 1.0
ttable.1.1 1.0
ttable.0.2 1.0
ttable.1.3 1.0
ttable.0.4 1.0
ttable.1.5 1.0
}
ctl.xbmc {
type hw
card 0
}
pcm.multi {
type multi
slaves.a.pcm "analog-hw"
slaves.a.channels 2
slaves.b.pcm "digital-hw"
slaves.b.channels 2
slaves.c.pcm "usb-hw"
slaves.c.channels 2
bindings.0.slave a
bindings.0.channel 0
bindings.1.slave a
bindings.1.channel 1
bindings.2.slave b
bindings.2.channel 0
bindings.3.slave b
bindings.3.channel 1
bindings.4.slave c
bindings.4.channel 0
bindings.5.slave c
bindings.5.channel 1
}
ctl.multi {
type hw
card 0
}
Now off to enjoy my many audio outputs!
