Using JACK for SimpleScreenRecorder

Using JACK for SimpleScreenRecorder

Permissions

Go to /etc/security/limits.conf and add these lines:

@audio          -       rtprio          80
@audio          -       memlock         unlimited

Then open a terminal and run: sudo usermod -a -G audio $USER && sudo adduser $USER hwaudio

Setup

Remove: sudo apt-get remove pulseaudio

Install: sudo apt-get install qjackctl jackd2

Create a .asoundrc in your home directory (~/.asoundrc) with the following contents:

pcm.!default {
    type plug
    slave { pcm "rawjack" }
}

pcm.rawjack {
    type jack
    playback_ports {
        0 system:playback_1
        1 system:playback_2
    }
    capture_ports {
        0 system:capture_1
        1 system:capture_2
    }
}

pcm.jack {
    type plug
    slave { pcm "rawjack" }
    hint {
    description "JACK Audio Connection Kit"
    }
}

Now restart your chroot.

Making Sound

Do sudo stop cras

Open QJackCtl (found under the 'Multimedia' tab in Xfce) and press start. Try recording with SSR. If there are no frames in either in or out, try executing jackd -r -d alsa -r 44100

If SSR works and you want JACK to automatically run on chroot startup, create a file called .jackdrc in your home directory. Set it to this:

sudo stop cras
jackd -r -d alsa -r 44100

I'm done...

Stop JACK by CTRL+C-ing it in the terminal if you have it up, AND stop it in QJackCtl. Then execute sudo start cras