Re: [Jack-Devel] Sync problems with jack outputting midi clock

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DateThu, 12 Jul 2012 07:29:17 -0400
From Paul Davis <[hidden] at linuxaudiosystems dot com>
To"Gabriel M. Beddingfield" <[hidden] at gmail dot com>
Cc[hidden] at lists dot jackaudio dot org
In-Reply-ToGabriel M. Beddingfield Re: [Jack-Devel] Sync problems with jack outputting midi clock
Follow-UpStéphane Letz Re: [Jack-Devel] Sync problems with jack outputting midi clock
or the bridging between CoreMIDI and JACK ....

you might try using jack_midi_dump too.

On 7/12/12, Gabriel M. Beddingfield <[hidden]> wrote:
>
> Hello,
>
> On 07/11/2012 08:47 PM, Iain Duncan wrote:
>> Hi folks, I've made a midi clock test app to help track down the issues
>> I've been having on OS X, but am getting some strange behaviour. Every
>> once in a while, I'm getting two clock messages 1 or 2 ms apart. I'm no
>> jack or C expert so it's quite possible I've made a stupid math error or
>> something. If anyone has the time to take a look at it, that would be
>
> I did a quick program to check the math... and it seems fine with all
> events about 21ms apart.
>
>> really helpful and would help us figure out whether there is an issue
>> with the OSX midi driver. In the app I deliberately aligned the tempo to
>> frame buffers to keep out as many sources of error as I could, it would
>> be great to know whether this looks like it should work.
>
> Nothing jumps out at me from the code.  How are you monitoring it?
>
> Ideally, if you hook up jack client to jack client and check the
> behaviour.  If it behaves fine then that points to the driver.
>
> -gabriel
> 
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