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alsa-mixer: Implement constant volume.

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This change makes it possible to configure an arbitrary constant volume for a
volume element in the path configuration, which is applied when the path is
selected. Note: this is only useful when the exact hardware and driver are
known beforehand.
This commit is contained in:
Tanu Kaskinen 2011-03-17 12:23:41 +02:00 • committed by Colin Guthrie
parent 55936640a1
commit e1c289cc6b
3 changed files with 59 additions and 12 deletions
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16
src/modules/alsa/mixer/paths/analog-output.conf.common
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@ -75,13 +75,15 @@
; 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 # 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)
; 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