Re: [Jack-Devel] [jackosx] Re: OS X jack midi message issues between jack and core midi

Le 3 août 2012 à 03:44, Devin Anderson a écrit :

> On Thu, Aug 2, 2012 at 1:54 PM, Stéphane Letz <[hidden]> wrote:
> 
>> Le 2 août 2012 à 21:40, Devin Anderson a écrit :
>>> I got around to looking at the JACK 2 code on github.com/jackaudio,
>>> and I don't see the fix applied for duplicate messages that I sent
>>> over.  I think the fix should be applied.
>> 
>> The patch has been applied on my private tree and is part of
>> latest JackOSX package, but it does not seem to fix the issue.
> 
> I don't think it fixes the *whole* issue.  Note that Iain said:
> 
>> - occasional clock messages are either dropped or duplicated
>> - if you look at the top of the screen shot, you can see:
>> - 24 clock messages per quarter in the jack_midi_dump output
>> - a duplicate clock message at 9:38:838 and 9:38:839 in the midi
>> monitor
>> - when these duplicate messages happen, there is a noticeable
>> lurch in the sync with abletone live ( running using jack as audio
>> driver )
> 
> ... referencing both dropped messages and duplicate messages.  I think
> that my patch takes care of one possible source of duplicate messages.

OK....

> 
>> So the issue still seems there...
> 
> I assume you've verified that the problem exists, and checked to make
> sure that Restart() hasn't been called when messages are dropped.

When the Midi setup changes, the JACK/CoreMIDI bridge is basically completely re-initialized.... Obviously messages may be dropped but I think this behavior is acceptable... and doing differently starts to be complex.

Iain is your MIDI setup changing dynamically?


> I'll look elsewhere.

OK.

> 
> @Iain: Have you checked to see if JACK is outputting any error
> messages when MIDI messages are dropped?
> 

Stéphane

1343973320.16578_0.ltw:2,a <CC965256-D965-4E2D-9D32-5E359937C23A at grame dot fr>