phenest wrote:I've just installed OSS4 as per the above HowTo, but can anyone tell me how to enable my LFE channel. I have a sub-woofer on my Dell Precision M90 which works with ALSA. Am I missing something?
EDIT: And my laptop speakers don't mute when I plug in my headphones.
I don't know about the headphones
* but I'll test mine some time. [
*Edit: Please see Note 2 below] I was able to get sound from all speakers following the simple instructions in this
guide from
dracolinux.
A word of WARNING: If you set high volumes, be sure to turn down the manual control to low, specially when using headphones to avoid a deafening blast. Just to make it clear to everyone, here's how I enabled all my speakers.
For example, in a terminal I first type:
In order to display the current values of the default mixer. One sees that rear and center speakers have the volumes set to zero:
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Selected mixer 0/AudigyLS Mixer
Known controls are:
pcm [<leftvol>:<rightvol>] (currently 94:94)
rear [<leftvol>:<rightvol>] (currently 0:0)
center [<leftvol>:<rightvol>] (currently 0:0)
ext.spread ON|OFF (currently ON)
pcm is set very high so I can set it, e.g. to 80:80 with this command:
Of course, for 5.1 surround sound one can set different values for the speakers depending on where these are positioned but for 2,1 sound just set the same values for both speakers.
Similarly I can set the rear and center left and right volumes thus:
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$ ossmix center 60:60
$ ossmix rear 60:60
The above settings will result in:
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$ ossmix pcm 60:60
Value of mixer control pcm set to 60.0:60.0
$ ossmix center 60:60
Value of mixer control center set to 60.0:60.0
$ ossmix rear 60:60
Value of mixer control rear set to 60.0:60.0
And I now get crystal-clear sound from all 5.1 speakers and can just use the manual control to turn the sound up or down.
Note 1: For 5.1 sound, it's also necessary to enable "spread." An easy way to do this is just to run the command
ossxmix to open the GUI application and mark the box.
*Edit Note 2: I have a headphones set which is connected via the green and pink phono connectors. I'm able to mute the speakers after I plugging in the headphones using the
ossxmixer (which I´ve now added to my Gnome Menu): All I have to do is to select
int-speaker mode (just below the top right-hand corner of the GUI and select
pcm2 instead of
pcm1 reesulting in sound only through the headphones. I haven't figured out how to automatically mute the laptop speakers yet. I don´t have USB headphones so I can´t say if this works for them too.