[Jack-Devel] How to capture audio from speaker?

[garden_9652 at yahoo.co.jp]

Hi
What I want is something like jack_capture, capture audio from system speaker and save it to disk, but without modify/setup any other thing like hook chrome to jack to play something.
I can simply use this app to capture the audio originated from chrome,  itunes or skype. anything.

Is jack capable to do this kind of thing?
Or do you know other ways to do this kind of thing?
Thank you
     ----- Original Message -----
 From: Kjetil Matheussen <k.s.matheussen at gmail.com>
 To: garden_9652 at yahoo.co.jp 
Cc: "k.s.matheussen at notam02.no" <k.s.matheussen at notam02.no>; "jack-devel at lists.jackaudio.org" <jack-devel at lists.jackaudio.org>
 Date: 2019/5/14, Tue 18:23
 Subject: Re: [Jack-Devel] How to capture audio from speaker?
   
On Tue, May 14, 2019 at 11:16 AM <garden_9652 at yahoo.co.jp> wrote:
>
> Hi
>
> It does not have to be Chrome, in order to use jack_capture
>
> How can play something use jack?
>

The best way is if the program has been written to output it's audio
to jack, using the libjack api.

Another way is to make an audio pipe, where you have a program/system
that creates two virtual audio devices, where the output device sends
the audio to the input device. If you have something like that, you
can make the output driver the default audio output device (all
programs sends to this device), and let jackd connect to the input
device. Maybe soundflower can do that, or maybe some other software.
You'll have to look around.


   
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