Re: [Jack-Devel] Linux to Linux jacknet ?

Tommaso Cucinotta, 2013-02-28 02:22:34 +0000 :

> Hi all,
>
> I'd like to use a server PC as a MIDI synthesizer, with a client PC
> sending out MIDI messages, and getting back synthesized audio.
>
> AFAIU, I can use "jackd -d net" on the server side, and "jackd
> opts...& jack_netsource -H <server-ip-addr>" on the client side to
> connect the two.
>
> However, it doesn't seem to work. When I run jack_netsource, it says
> "Not connected". What may be going wrong here ? Also, on the server
> side, I can't connect any jack client. I guess that, until I don't
> have a master connected, the server-side jackd doesn't really start.
>
> What is "jack_load netmanager" useful for, instead ?
>
> Can anyone suggest a supposedly working set-up involving Linux on both
> client and server ends ? (I'm using latest jackd2 as from official
> Ubuntu repos).

I'm sure we could argue all day about which end is the client and which
is the server, but something that works here (order may matter):

- on the laptop (elastomir), "jack_load netmanager" (it probably starts
  listening to messages or broadcasting that it is ready to do so);
- on the desktop (polymir), "jackd -d net" (actually I start it through
  Qjackctl, but whatever).

  Then the desktop gets two source channels and two sink channels which
are respectively routed from and to similar pairs of channels named
polymir:from_slave_1/2 and polymir:to_slave_1/2 on the laptop.  If I
send audio to the sinks on the desktop (for instance with PulseAudio),
then use Patchage (or qjackctl) on the laptop to patch the
polymir:from_slave_1/2 sources into the local system:playback_1/2, then
the sound goes out from the laptop's soundcard.  If I send the laptop's
PulseAudio stream to polymir:to_slave_1/2 instead, it can run through an
effects rack that runs on the desktop, then be sent back to the laptop.

  I have no idea about jack_netsource; I'd welcome more details, but the
described setup works and may be helpful :-)

Roland.
-- 
Roland Mas

C'est dans la boue la plus nauséeuse que plongent les racines de
l'étincelante fleur de lotus. -- in Sri Raoul le petit yogi (Gaudelette)

1362040968.31981_0.ltw:2,a <87sj4gg77r.fsf at polymir dot internal dot placard dot fr dot eu dot org>