[LAU] connecting jack between a linux audio master and a windows slave

From: Athanasios Silis <athanasios.silis@email-addr-hidden>
Date: Sun Nov 16 2014 - 02:42:39 EET

Hi all,
i'm attempting to connect a slave jack running on windows 7 64bit and a
jack master running on linux ubuntu studio 14.04 64bit.
jack is verified to be 1.9.10 on both sides.
firewall is also completely open between windows and linux.
the 2 ends can ping each other - no problem

jack master is running on alsa and with netjack2 also running. other linux
pc's connect without a problem to this jack master.

but jack slave running from windows does not show up on master jack... what
can I assume is wrong?
mtu have not been tampered with.

jack slave on windows states:

C:\Program Files (x86)\Jack>jackd.exe -dnet -i2 -o9 -C8 -p8
jackdmp 1.9.10
Copyright 2001-2005 Paul Davis and others.
Copyright 2004-2014 Grame.
jackdmp comes with ABSOLUTELY NO WARRANTY
This is free software, and you are welcome to redistribute it
under certain conditions; see the file COPYING for details
Drivers/internals found in : C:\Windows
Drivers/internals found in : C:\Windows
JACK server starting in realtime mode with priority 10
self-connect-mode is "Don't restrict self connect requests"
InitTime : multimedia timer resolution set to 1 milliseconds
MMCSS API not used...
NetDriver started in async mode without Master's transport sync.
Waiting for a master...

and here is the same running it with verbose output :
http://pastebin.com/KZTRLigc

I am using 'tcpdump' on the *jack master* to listen for udp packets on port
19000 (where jack broadcasts by default). the cmd is:
tcpdump host <ip_of_jackd_client> and udp port 19000
In turn I checked some linux clients and the windows client:

linux cl1 (ip 192.168.112.133 - name jackcl1)
16:10:39.532802 IP jackcl1.19000 > jack_master.58548: UDP, length 44
16:10:39.533960 IP jack_master.58548 > jackcl1.19000: UDP, length 1500
16:10:39.533970 IP jack_master.58548 > jackcl1.19000: UDP, length 204

linux client 2 (ip 192.168.112.144 - name jackcl2) looks similar
16:23:09.842778 IP jackcl2.19000 > jack_master.54735: UDP, length 204
16:23:09.842782 IP jackcl2.19000 > jack_master.54735: UDP, length 564
16:23:09.843880 IP jack_master.54735 > jackcl2.19000: UDP, length 1500
16:23:09.843890 IP jack_master.54735 > jackcl2.19000: UDP, length 204

unfortunately it looks like the windows jack client sends out the packets,
but the jack master never responds...
16:11:52.040582 IP wincl1.19000 > jack_master.19000: UDP, length 644
16:11:53.528440 IP wincl1.19000 > jack_master.19000: UDP, length 644
16:11:55.028455 IP wincl1.19000 > jack_master.19000: UDP, length 644

can you make anything out of that?

thank you in advance for your help.

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Received on Sun Nov 16 04:15:02 2014

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