RE: [Alsa-devel] AC3 passthru intel8x0 + cs4299

Sun, 23 Feb 2003 12:34:19 -0800 

Hi,
0x0200 should be the right bit for DAC power off register AC97_POWERDOWN (0x26), but 
where
is the best place to set the bit.
 
CU
Bernd Zierath

        -----Original Message----- 
        From: Peter Heatwole [mailto:[EMAIL PROTECTED] 
        Sent: Sun 2/23/2003 8:30 PM 
        To: [EMAIL PROTECTED]; Zierath Bernd 
        Cc: 
        Subject: Re: [Alsa-devel] AC3 passthru intel8x0 + cs4299
        
        

        Zierath Bernd wrote:
        > AC3 passthru on the cs4299 is not implemted right now, is anyone on the list
        > willing to help.
        
           Another question: do you have to be able to access the IEC958 directly to
        send AC3 to it?  Currently the cs4299, cs4297a, and the cs4294 merely copy the
        playback data to the IEC958 port, without direct access.  Could you simply 
power
        down the playback SRC and the DAC, send data to the card, and let the codec 
copy
        the unmodified steram to the IEC958 output as usual, allowing an AC3 stream to 
be
        sent to an external decoder?
           I realize there may be timing and other issues involved, I'm only asking 
this
        from a theoretical standpoint
        
        -- Peter Heatwole
        "Murphy was just a well known pessimist."
        
        

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