seq24 0.9.2 doesn't respond to JACK Transport (JACK 0.12x.x)

I can confirm this with jack 0.120.2, haven't tried yet if the issue disappears with jack 0.118

yes, downgrading to 0.118 (and recompiling seq24) solves the issue for me too

The developer who created the patches can't find them back anymore. But they have been sent to the seq24 dev team so hopefully they can be dug up again. I'd like to test jack-session but this is holding me back.

Best,

Jeremy

Just went through 2010-2011 archives of seq24-devel mailing list and only relevant thing I could find was this

http://sourceforge.net/mailarchive/forum.php?thread_name=20101111203416.GA18268%40traun.gscholz.bayernline.de&forum_name=seq24-devel

patch by torben to add jack-session support. It would seem unrelevant to this bug, but if you read his second mail he seems to say that jack transport wasn't working for him on the then jack-svn which had the jack session API, which is now currently in jack1 > 0.118

so it could be related to that?

yes this bug is pretty severe IMHO as it makes seq24 unusable with other apps.

sorry, I confused. It's actually in this mail

http://lists.linuxaudio.org/pipermail/linux-audio-user/2010-November/073848.html

on LAU in November that he was saying he couldn't get jack transport in seq24 working with jack1-svn

I can confirm this bug on latest bazaar version, 125

Hi,

I stumbled into this bug as well when switching to Arch Linux.
Seq24 doesn't run at all with newer jack.
By following the linuxaudio mailing list link above, I saw that there
is a quick and dirty fix possible, until somebody fixes up jack transport
properly. All you have to do is register an empty process callback with JACK.

That's what I've done in the patch below, and it worked fine for me.
Is there somebody of the seq24 team that could apply this patch,
so that a lot of people can actually use seq24 again?
A quick release with this patch would be advisable too, I think.

Greetings,

lievenmoors

Hi, you're sure it's the same bug? For me (also on Arch) with jack transport disabled the playback works fine...

Any news on this?

Yes this is the same bug. JACK transport works again for me with this patch (which has been applied upstream: http://bazaar.launchpad.net/~seq24team/seq24/trunk/revision/128).

Jeremy

hadn't tested enough: it works for me also but only if set as Jack Master

I just found this patch and applied. My findings are the same: it only works when seq24 is set as jack master.

Not necessarily, you can use another application (like Qtractor) as JACK master and seq24 will follow.