[Openal] How to select output channel

[Daniel PEACOCK]

Hi,

The Creative OpenAL SDK includes some example code that shows how to load
and play multichannel wavefiles (the "PlayMultiChannel" sample project).
The CWaves class shows how to load in WAVEFORMATEXTENSIBLE wavefiles and
determine the appropriate OpenAL Buffer format enum to be passed into the
alBufferData call.

http://connect.creativelabs.com/developer/Wiki/OpenAL%20SDK%20for%20Windows.aspx

Dan
Creative Labs (UK) Ltd.

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             Jason Daly                                                    
             <jdaly at ist.ucf.ed                                             
             u>                                                         To 
                                       Martin Diz <listas at martirac.com.ar> 
             04/02/2009 07:04                                           cc 
             PM                        Daniel PEACOCK                      
                                       <dpeacock at creativelabs.com>,        
                                       "openal at opensource.creative.com"    
                                       <openal at opensource.creative.com>    
                                                                   Subject 
                                       Re: [Openal] How to select output   
                                       channel                             
                                                                           
                                                                           
                                                                           
                                                                           
                                                                           
                                                                           




Martin Diz wrote:
      On Fri, Mar 27, 2009 at 13:34, Daniel PEACOCK <
      dpeacock at creativelabs.com> wrote:
        Hi,

        Another option would be to create a 5.1 (or 7.1) audio stream on
        the fly and put the mono audio data into the appropriate channel(s)
        and silence in the remaining channels. You could do this for each
        input channel or if you have lots of channels then you could mix
        everything together into one 5.1 (or 7.1) stream.


      Hello, would you please point me to a document or web page with info
      to do this? I read the openAL 1.1 pecification document, but the only
      thing i found is that buffers can handle only 2 channels, I'm wrong?

The AL_EXT_MCFORMATS extension (which most of the major implementations now
support), adds several new format specifications for multi-channel data.

The specification isn't very descriptive, but you can see the additional
format tags here:

    http://tinyurl.com/d8f9mu

--"J"
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