Re: How do create a dummy device for recording audio? Does it exist already?

[Caleb Crome <alsa@crome.org>]

Arek,
    That looks like what I want.  However, I'm sorry to be such an 
ignoramus -- what do I do with that bit of configuration data?  I found 
the /usr/share/alsa/alsa.conf, and there is a similar pcm.file entry in 
that, but it seems to take parameters.  Since I have no sound card, how 
do I configure my system to use the dummy PCM driver and use the 
pcm.file plugin? 

Sorry to the developer community -- this is a user question.  I'll move 
the thread over there if it continues on. 

Thanks,
    -Caleb


Arek Korbik wrote:

>On Thu, 2004-04-22 at 14:44, Caleb Crome wrote:
>  
>
>>I'd like to create a dummy audio device that can record the PCM data 
>>written to it into a file.  So, the dummy device would appear as a sound 
>>card to the audio program (Real Player for example), and start dumping 
>>    
>>
>
>How about 'file' type plugin? For example:
>
>pcm.file {
>    type file
>    slave {
>        pcm "hw:0,0"
>    }
>    file "/tmp/file.raw"
>}                                                                              
>  
>
>>audio into a file, or maybe it would create another device that could be 
>>read simply by 'dd' or some custom command.  Then I'd pipe the data into 
>>    
>>
>
>It works with named pipes as well.
>
>http://www.alsa-project.org/alsa-doc/alsa-lib/pcm_plugins.html#pcm_plugins_file
>
>Arek
>
>
>
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