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

garden_9652 at yahoo.co.jp garden_9652 at yahoo.co.jp
Tue May 14 11:01:28 CEST 2019

I have install jack_capture and how can I run it?
$ jack_capture./jack_captureCannot connect to server socket err = No such file or directoryCannot connect to server request channeljack server is not running or cannot be startedJackShmReadWritePtr::~JackShmReadWritePtr - Init not done for -1, skipping unlockJackShmReadWritePtr::~JackShmReadWritePtr - Init not done for -1, skipping unlock>>> jack_client_open() failed, status = 0x11

So I start jackd :
$ jackd -d coreaudio
then start jack_capture
$ jack_capture
then it starts to record, but the audio file I got jack_capture_01.wav is just blank
Anything wrong? 

     ----- 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 17:51
 Subject: Re: [Jack-Devel] How to capture audio from speaker?
On Tue, May 14, 2019 at 10:49 AM <garden_9652 at yahoo.co.jp> wrote:
> Hi
> Thank you so much for your quick response.
> I'm doing this for a side project, I need to capture the audio from speak and do some other tasks on the audio file once it's saved on disk.
> I'll look into jack_capture
Yes, that's what jack_capture was made for. Just run it without any
arguments, and it will record a stereo file, floating point wav, to
github page: https://github.com/kmatheussen/jack_capture 

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