Re: Mono to stereo ?

[Jeff Muizelaar <muizelaar@rogers.com>]

Takashi Iwai wrote:

>At Fri, 28 Mar 2003 11:21:04 -0500,
>Jeff Muizelaar wrote:
>  
>
>>Takashi Iwai wrote:
>>
>>    
>>
>>>At Thu, 27 Mar 2003 23:14:22 -0400,
>>>Manuel Jander wrote:
>>> 
>>>
>>>      
>>>
>>>>...but, if you are doing mono playback, your sound driver has to setup
>>>>your soundcard to playback on both channels the same mono channel. The 
>>>>Vortex
>>>>driver (still not in the main branch) for example splits the mono signal 
>>>>on its internal
>>>>
                     ^^ By this Manuel means the mixer internal to the 
card not internal to the driver.

>>>>mixer into 2 identical signals which are feed one into each CODEC channels.
>>>>   
>>>>
>>>>        
>>>>
>>>no, please don't do that.
>>>in the ALSA, instead of the lowlevel driver, alsa-lib (and
>>>oss-emulation module) will do this job.
>>>
>>>      
>>>
>>In this case the card (not driver) is spliting the mono signal and 
>>sending it to both right and left channels of the codec. Thus 
>>channels_min should still be 1 because the card does actually support a 
>>single channel
>>    
>>
>
>hmm, which driver do you mean?  from the above context, i read that
>the driver needs to split the signals by itself...
>  
>
The vortex driver. Yeah rereading it, i understand how you interpreted it.

-Jeff



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