122 lines
4.4 KiB
ReStructuredText
122 lines
4.4 KiB
ReStructuredText
======================================
|
|
HD-Audio Codec-Specific Mixer Controls
|
|
======================================
|
|
|
|
|
|
This file explains the codec-specific mixer controls.
|
|
|
|
Realtek codecs
|
|
--------------
|
|
|
|
Channel Mode
|
|
This is an enum control to change the surround-channel setup,
|
|
appears only when the surround channels are available.
|
|
It gives the number of channels to be used, "2ch", "4ch", "6ch",
|
|
and "8ch". According to the configuration, this also controls the
|
|
jack-retasking of multi-I/O jacks.
|
|
|
|
Auto-Mute Mode
|
|
This is an enum control to change the auto-mute behavior of the
|
|
headphone and line-out jacks. If built-in speakers and headphone
|
|
and/or line-out jacks are available on a machine, this controls
|
|
appears.
|
|
When there are only either headphones or line-out jacks, it gives
|
|
"Disabled" and "Enabled" state. When enabled, the speaker is muted
|
|
automatically when a jack is plugged.
|
|
|
|
When both headphone and line-out jacks are present, it gives
|
|
"Disabled", "Speaker Only" and "Line-Out+Speaker". When
|
|
speaker-only is chosen, plugging into a headphone or a line-out jack
|
|
mutes the speakers, but not line-outs. When line-out+speaker is
|
|
selected, plugging to a headphone jack mutes both speakers and
|
|
line-outs.
|
|
|
|
|
|
IDT/Sigmatel codecs
|
|
-------------------
|
|
|
|
Analog Loopback
|
|
This control enables/disables the analog-loopback circuit. This
|
|
appears only when "loopback" is set to true in a codec hint
|
|
(see HD-Audio.txt). Note that on some codecs the analog-loopback
|
|
and the normal PCM playback are exclusive, i.e. when this is on, you
|
|
won't hear any PCM stream.
|
|
|
|
Swap Center/LFE
|
|
Swaps the center and LFE channel order. Normally, the left
|
|
corresponds to the center and the right to the LFE. When this is
|
|
ON, the left to the LFE and the right to the center.
|
|
|
|
Headphone as Line Out
|
|
When this control is ON, treat the headphone jacks as line-out
|
|
jacks. That is, the headphone won't auto-mute the other line-outs,
|
|
and no HP-amp is set to the pins.
|
|
|
|
Mic Jack Mode, Line Jack Mode, etc
|
|
These enum controls the direction and the bias of the input jack
|
|
pins. Depending on the jack type, it can set as "Mic In" and "Line
|
|
In", for determining the input bias, or it can be set to "Line Out"
|
|
when the pin is a multi-I/O jack for surround channels.
|
|
|
|
|
|
VIA codecs
|
|
----------
|
|
|
|
Smart 5.1
|
|
An enum control to re-task the multi-I/O jacks for surround outputs.
|
|
When it's ON, the corresponding input jacks (usually a line-in and a
|
|
mic-in) are switched as the surround and the CLFE output jacks.
|
|
|
|
Independent HP
|
|
When this enum control is enabled, the headphone output is routed
|
|
from an individual stream (the third PCM such as hw:0,2) instead of
|
|
the primary stream. In the case the headphone DAC is shared with a
|
|
side or a CLFE-channel DAC, the DAC is switched to the headphone
|
|
automatically.
|
|
|
|
Loopback Mixing
|
|
An enum control to determine whether the analog-loopback route is
|
|
enabled or not. When it's enabled, the analog-loopback is mixed to
|
|
the front-channel. Also, the same route is used for the headphone
|
|
and speaker outputs. As a side-effect, when this mode is set, the
|
|
individual volume controls will be no longer available for
|
|
headphones and speakers because there is only one DAC connected to a
|
|
mixer widget.
|
|
|
|
Dynamic Power-Control
|
|
This control determines whether the dynamic power-control per jack
|
|
detection is enabled or not. When enabled, the widgets power state
|
|
(D0/D3) are changed dynamically depending on the jack plugging
|
|
state for saving power consumptions. However, if your system
|
|
doesn't provide a proper jack-detection, this won't work; in such a
|
|
case, turn this control OFF.
|
|
|
|
Jack Detect
|
|
This control is provided only for VT1708 codec which gives no proper
|
|
unsolicited event per jack plug. When this is on, the driver polls
|
|
the jack detection so that the headphone auto-mute can work, while
|
|
turning this off would reduce the power consumption.
|
|
|
|
|
|
Conexant codecs
|
|
---------------
|
|
|
|
Auto-Mute Mode
|
|
See Reatek codecs.
|
|
|
|
|
|
Analog codecs
|
|
--------------
|
|
|
|
Channel Mode
|
|
This is an enum control to change the surround-channel setup,
|
|
appears only when the surround channels are available.
|
|
It gives the number of channels to be used, "2ch", "4ch" and "6ch".
|
|
According to the configuration, this also controls the
|
|
jack-retasking of multi-I/O jacks.
|
|
|
|
Independent HP
|
|
When this enum control is enabled, the headphone output is routed
|
|
from an individual stream (the third PCM such as hw:0,2) instead of
|
|
the primary stream.
|