Recording audio from the speaker

[NoOp]

On 08/31/2009 06:52 AM, Dotan Cohen wrote:
> 2009/8/30 David Fox <dfox94085 at gmail.com>:
>> On Wed, Aug 26, 2009 at 6:02 AM, Dotan Cohen<dotancohen at gmail.com> wrote:
>>> Is there some capture device that I could use to record audio that is
>>> being sent to the system speakers? I need to record (legally) audio
>>
>> You probably want to record from the DSP source, which is the signal
>> sent to the speakers from the sound card. But be careful. For instance
>> if you have a microphone active that is not muted, you'll record
>> coughing and key clicks too :).
>>
>> I used that technique, successfully, when using sox to record radio
>> programs that I was listening to at the same time, or at a specified
>> time using cron.
>>
>> #! /bin/sh
>> sox -V -c2 -r 44100 -t ossdsp -w -s /dev/dsp $1.ogg
>>
>>
>> You can use it to record raw, wav, or ogg (I think the latter is
>> limited to 128k/sec, though). But the trick is the -t ossdsp
>> parameter. The other parameters set the number of channels (-c2), the
>> sample rate (r 44100), and the type of sample data (-w -s I think are
>> unsigned shorts).
>>
>>
> 
> Thanks! It seems that ossdsp is not a valid filetype on my system, and
> I cannot find a list of valid filetypes to choose from. Furthermore,
> the -w option is invalid on my system as well. How can I get a list of
> valid filetypes, and what is the -w option for on your system?
> 
> 

http://manpages.ubuntu.com/manpages/jaunty/en/man1/sox.1.html
(search on: -w (space-dash-w). Formats are here:
http://manpages.ubuntu.com/manpages/jaunty/en/man7/soxformat.7.html