Re: [Jack-Devel] routing alsa through jack

Lucio Crusca:
>
> Now I have my alsa<->jack routuing working with alsa_in and alsa_out.
> I'd like to move to zita.
>
> My working script is:
>
> #--8X--------------
> jackd -R -P 95 -T -ndefault -d alsa  --period 128 --device hw:1 &
> sleep 1
>
> # create the loop ALSA <-> JACK
> alsa_out -j ploop -dploop -q 1 &
> alsa_in -j cloop -dcloop -q 1 &
>
> # wait 1 second
> sleep 1
>
> # cloop ports -> jack output ports
> jack_connect cloop:capture_1 system:playback_1
> jack_connect cloop:capture_2 system:playback_2
>
> # jack input ports -> ploop ports
> jack_connect system:capture_1 ploop:playback_1
> jack_connect system:capture_2 ploop:playback_2
> #--8X--------------
>

I used this setup a while too, but it didn't work
very well. There was a latency on around a second,
and I also got some scratching noises now and then.

So a while ago (still), I changed my .asoundrc file like this:

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"
    }
}

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


And suddenly I got no noticable delay, no scratching
sounds now and then, and almost no trouble [1].

What am I missing? Why run through the trouble
of setting up alsa_in, do the loop-thing, scripting,
and so forth?

[1] Only trouble: I have to restart the chrome
browser after stopping and starting jack.

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