Re: [gentoo-user] Poor mans audio in the world of the great Jack D.

[Bruce Schultz]

On Thu, May 21, 2015 at 12:59 PM, Bruce Schultz <brulzki@×××××.com> wrote:

> On 21 May 2015 2:23:54 AM AEST, Meino.Cramer@×××.de wrote:
> >Emanuele Rusconi <emarsk@×××××.com> [15-05-20 17:36]:
> >> On 19 May 2015 at 17:24,  <Meino.Cramer@×××.de> wrote:
> >> >
> >> > The master control program (qsstv) raises its shield against Tron,
> >displaying
> >> > "Sound card error: Device or resource busy."
> >> >
> >> > And silence was the only voice heard by the folks...
> >> > And nothing was displayed anymore.
> >>
> >> Oops, I forgot the last line of my koan:
> >>
> >> pcm.!default { type plug; slave { pcm "rawjack" } }
> >>
> >> -- Emanuele Rusconi
> >>
> >
> >...and confusion reaches the head of great Jack D. and
> >from his mouth the words were heard:
> >
> >#>sudo /etc/init.d/jackd restart
> > * Starting JACK Daemon ...
> >* JACK daemon can't be started! Check logfile: /var/log/jackd.log
> >                             [ !! ]
> > * ERROR: jackd failed to start
> >[1]    6210 exit 1     sudo /etc/init.d/jackd restart
> >
> >...but none of his words, which were good and wise in the past, were
> >written down for those who came after him:
> >
> >#>ls -l /var/log/jackd.log
> >-rw-r--r-- 1 root root 0 2015-05-20 18:18 /var/log/jackd.log
> >
> >And the children - left alone in the dark of this ancient machine -
> >stared into the empty LED eyes of their grandmaster not knowing
> >to where to go and whether to flee or stand still...
> >
> >"Help - Oh help us brotheren of the Gentoo! Help!"
> >they cried.
>
> Perhaps the great Jack D. Is talking to itself?
>
> The pcm.!default line says: when opening alsa, connect to rawjack
>
> The earlier .asoundrc says: when opening alsa rawjack, direct the
> connection to the great Jack D.
>
> If the jackd connects to the default alsa output, aka rawjack, coult it be
> tripping itself up? Is there maybe a jack option to direct the alsa output
> to the sound hardware instead?
>
>
> Looks like I'm off on the wrong track... by default, jack connects to the
hw:0 alsa device, which is the sound hardware.

This page has another example of asoundrc config which might work better
for you.
https://wiki.archlinux.org/index.php/JACK_Audio_Connection_Kit
(search for "Playing nice with ALSA")

The config file contents is:

# convert alsa API over jack API
# use it with
# % aplay foo.wav

# use this as default
pcm.!default {
    type plug
    slave { pcm "jack" }
}

ctl.mixer0 {
    type hw
    card 1
}

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



> --
> :B
>