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

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DateSun, 15 Jul 2012 13:53:56 -0700
From Devin Anderson <[hidden] at gmail dot com>
ToPaul Davis <[hidden] at linuxaudiosystems dot com>
Cc[hidden] at lists dot jackaudio dot org, [hidden] at yahoogroups dot com
In-Reply-ToPaul Davis Re: [Jack-Devel] OS X jack midi message issues between jack and core midi
-- 
Devin Anderson
surfacepatterns (at) gmail (dot) com
Sent via Droid

synthclone - http://synthclone.googlecode.com
 On Jul 15, 2012 10:19 AM, "Paul Davis" <[hidden]> wrote:

>
>
> On Sun, Jul 15, 2012 at 1:17 PM, Paul Davis <[hidden]>wrote:
>
>>
>>
>> On Sun, Jul 15, 2012 at 1:12 PM, Paul Davis <[hidden]>wrote:
>>
>>>
>>>
>>> On Sun, Jul 15, 2012 at 12:58 PM, Iain Duncan <[hidden]
>>> > wrote:
>>>
>>>> Hi everyone, following Paul and Stephane's suggestion, I ran
>>>> jack_midi_dump along with a standard os x midi monitor during my sync tests.
>>>>
>>>> Files, including source and screenshot, are at:
>>>> http://industry.flyingnotfalling.com/audio_code
>>>>
>>>> Here is what I've found ( duplicated in link as jack_midi_test_notes )
>>>>
>>>> - system is OS X 10.6.8
>>>> - jack is Jack OSX 0.9 ( beta from Stephane )
>>>> - test app compiled with:
>>>>   g++ -o jack_midi_1 -framework Jackmp jack_midi_1.cpp
>>>>
>>>> - 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 )
>>>>
>>>
>>> where are the sysex msgs seen in jack_midi_monitor? they don't seem to
>>> show up in the system midi monitor ....
>>>
>>
>> duh, they are not sysexs :(
>>
>
> so counting again, there are 24 clock messages showing up in
> jack_midi_dump between note ons, and 25 in the os x monitor. this points
> the finger at the coremidi/jackmidi bridge.
>
>
> 
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