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# This file is part of PulseAudio.
# PulseAudio is free software; you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as
# published by the Free Software Foundation; either version 2.1 of the
# License, or (at your option) any later version.
# PulseAudio is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# General Public License for more details.
# You should have received a copy of the GNU Lesser General Public License
# along with PulseAudio; if not, see <>.
; Common part of all paths
; So here's generally how mixer paths are used by PA: PA goes through
; a mixer path file from top to bottom and checks if a mixer element
; described therein exists. If so it is added to the list of mixer
; elements PA will control, keeping the order it read them in. If a
; mixer element described here has set the required= or
; required-absent= directives a path might not be accepted as valid
; and is ignored in its entirety (see below). However usually if a
; element listed here is missing this one element is ignored but not
; the entire path.
; When a device shall be muted/unmuted *all* elements listed in a path
; file with "switch = mute" will be toggled.
; When a device shall change its volume, PA will got through the list
; of all elements with "volume = merge" and set the volume on the
; first element. If that element does not support dB volumes, this is
; where the story ends. If it does support dB volumes, PA divides the
; requested volume by the volume that was set on this element, and
; then go on to the next element with "volume = merge" and then set
; that there, and so on. That way the first volume element in the
; path will be the one that does the 'biggest' part of the overall
; volume adjustment, with the remaining elements usually being set to
; some value next to 0dB. This logic makes sure we get the full range
; over all volume sliders and a very high granularity of volumes
; already in hardware.
; All switches and enumerations set to "select" are exposed via the
; "port" functionality of sinks/sources. Basically every possible
; switch setting and every possible enumeration setting will be
; combined and made into a "port". So make sure you don't list too
; many switches/enums for exposing, because the number of ports might
; rise exponentially.
; Only one path can be selected at a time. All paths that are valid
; for an audio device will be exposed as "port" for the sink/source.
; [General]
; priority = ... # Priority for this path
; description-key = ... # The path description is looked up from a table in path_verify() in
; # src/modules/alsa/alsa-mixer.c. By default the path name (i.e. the file name
; # minus the ".conf" suffix) is used as the lookup key, but if this option is
; # set, then the given string is used as the key instead. In any case the
; # "description" option can be used to override the path description.
; description = ... # Description for this path. Overrides the normal description lookup logic, as
; # described in the "description-key" documentation above.
; mute-during-activation = yes | no # If this path supports hardware mute, should the hw mute be used while activating this
; # path? In some cases this can reduce extra noises during port switching, while in other
; # cases this can increase such noises. Default: no.
; eld-device = ... # If this is an HDMI port, set to "auto" so that PulseAudio will try to read
; # the monitor ELD information from the ALSA mixer. By default the ELD information
; # is not read, because it's only applicable with HDMI. Earlier the "auto" option
; # didn't exist, and the hw device index had to be manually configured. For
; # backwards compatibility, it's still possible to manually configure the device
; # index using this option.
; [Properties] # Property list for this path. The list is merged into the port property list.
; <key> = <value> # Each property is defined on its own line.
; ...
; [Option ...:...] # For each option of an enumeration or switch element
; # that shall be exposed as a sink/source port. Needs to
; # be named after the Element, followed by a colon, followed
; # by the option name, resp. on/off if the element is a switch.
; name = ... # Logical name to use in the path identifier
; priority = ... # Priority if this is made into a device port
; required = ignore | enumeration | any # In this element, this option must exist or the path will be invalid. ("any" is an alias for "enumeration".)
; required-any = ignore | enumeration | any # In this element, either this or another option must exist (or an element)
; required-absent = ignore | enumeration | any # In this element, this option must not exist or the path will be invalid
; [Element ...] # For each element that we shall control
; required = ignore | switch | volume | enumeration | any # If set, require this element to be of this kind and available,
; # otherwise don't consider this path valid for the card
; required-any = ignore | switch | volume | enumeration | any # If set, at least one of the elements or jacks with required-any in this
; # path must be present, otherwise this path is invalid for the card
; required-absent = ignore | switch | volume # If set, require this element to not be of this kind and not
; # available, otherwise don't consider this path valid for the card
; switch = ignore | mute | off | on | select # What to do with this switch: ignore it, make it follow mute status,
; # always set it to off, always to on, or make it selectable as port.
; # If set to 'select' you need to define an Option section for on
; # and off
; volume = ignore | merge | off | zero | <volume step> # What to do with this volume: ignore it, merge it into the device
; # volume slider, always set it to the lowest value possible, or always
; # set it to 0 dB (for whatever that means), or always set it to
; # <volume step> (this only makes sense in path configurations where
; # the exact hardware and driver are known beforehand).
; volume-limit = <volume step> # Limit the maximum volume by disabling the volume steps above <volume step>.
; enumeration = ignore | select # What to do with this enumeration, ignore it or make it selectable
; # via device ports. If set to 'select' you need to define an Option section
; # for each of the items you want to expose
; direction = playback | capture # Is this relevant only for playback or capture? If not set this will implicitly be
; # set the direction of the PCM device is opened as. Generally this doesn't need to be set
; # unless you have a broken driver that has playback controls marked for capture or vice
; # versa
; direction-try-other = no | yes # If the element does not supported what is requested, try the other direction, too?
; override-map.1 = ... # Override the channel mask of the mixer control if the control only exposes a single channel
; override-map.2 = ... # Override the channel masks of the mixer control if the control only exposes two channels
; # Override maps should list for each element channel which high-level channels it controls via a
; # channel mask. A channel mask may either be the name of a single channel, or the words "all-left",
; # "all-right", "all-center", "all-front", "all-rear", and "all" to encode a specific subset of
; # channels in a mask
; [Jack ...] # For each jack that we will use for jack detection
; # The name 'Jack Foo' must match ALSA's 'Foo Jack' control.
; required = ignore | any # If not set to ignore, make the path invalid if this jack control is not present.
; required-absent = ignore | any # If not set to ignore, make the path invalid if this jack control is present.
; required-any = ignore | any # If not set to ignore, make the path invalid if no jack controls and no elements with
; # the required-any are present.
; state.plugged = yes | no | unknown # Normally a plugged jack would mean the port becomes available, and an unplugged means it's
; state.unplugged = yes | no | unknown # unavailable, but the port status can be overridden by specifying state.plugged and/or state.unplugged.
; append-pcm-to-name = no | yes # Add ",pcm=N" to the jack name? N is the hw PCM device index. HDMI jacks have
; # the PCM device index in their name, but different drivers use different
; # numbering schemes, so we can't hardcode the full jack name in our configuration
; # files.
[Element PCM]
switch = mute
volume = merge
override-map.1 = all
override-map.2 = all-left,all-right
[Element External Amplifier]
switch = select
[Option External Amplifier:on]
name = output-amplifier-on
priority = 10
[Option External Amplifier:off]
name = output-amplifier-off
priority = 0
[Element Bass Boost]
switch = select
[Option Bass Boost:on]
name = output-bass-boost-on
priority = 0
[Option Bass Boost:off]
name = output-bass-boost-off
priority = 10
[Element IEC958]
switch = off
[Element IEC958 Optical Raw]
switch = off
;;; 'Analog Output'
[Element Analog Output]
enumeration = select
[Option Analog Output:Speakers]
name = output-speaker
priority = 10
[Option Analog Output:Headphones]
name = output-headphones
priority = 9
[Option Analog Output:FP Headphones]
name = output-headphones
priority = 8