Re: EDP and Logic Glitches

[Daniel Hegarty <danielphegarty@googlemail.com>]

Hey Per,

Just wanted to give you an update on the issue and see if you had any insight.

We ran the set a couple of times until one of the errors showed up, then reviewed the issue using MidiMonitor. On the whole i always use the SUS commands for the EDP, as it allows us be to be really precise with loop lengths. The error occurred when sending 4 'D3's (D3 being a 'general reset') out simultaneously to the 4 EDPS. I have these programmed as just 1 frame long, and ordinarily it works fine. In this case I could see that only the note-offs had fired, and the note-ons had been missed. I looped the track 20 or 30 times but could not repeat the error. But at our next rehearsal the same issue recurred! 

I can't imagine why this would be happening intermittently. It's not only D3's, once in a while a mute or a record will miss. It just seems that Logic is slightly unstable. What is interesting is this tends to only happen when we are actually playing, at which point we are playing soft-synths simultaneously to the midi tracks controlling the EDPs. I'm using a decent spec Macbook Pro, but perhaps it's just too much for the system to handle?

Very frustrating! Thanks again for your help.

Daniel

2009/5/15 Daniel Hegarty <danielphegarty@googlemail.com>

I have. I ran MidiMonitor last night for the full length of the 30 minute track, and it all looked very healthy, no glitches.

However, we also run 6 or 7 softsynths in the logic file which we play live. We have two midi keyboards inputting and playing these instruments, at different points, but also occasionally simultaneously. On the most part it works fine, the trouble is we're normally playing when the glitches happen so it's difficult to keep an eye on the MidiMonitor. Though, now I think about it, we could run MidiMonitor while we're playing and then review the log afterwards. Good idea!

I'll let you know the results.

Thanks

Daniel

2009/5/15 Per Boysen <perboysen@gmail.com>

On Fri, May 15, 2009 at 1:01 PM, Daniel Hegarty

<danielphegarty@googlemail.com> wrote:
> It just seems like once in a while, logic decides not to bother sending the
> signals. Could that be CPU related do you think? I am running quite a lot
> off just a macbook pro.

Well, that's indeed odd. But there has to be an explanation that we
yet don't know about. Definitely not CPU related, because Logic would
pop up a warning message before that happens. Are you sure it simply
stops sending out the MIDI that is spinning in the sequencer? Have you
monitored the MIDI Out port? That would be a good way to start
trouble-shooting.

Per