forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
121 lines
4.4 KiB
121 lines
4.4 KiB
====================================== |
|
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 Realtek 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.
|
|
|