Re: EDP and Logic Glitches

[Daniel Hegarty <danielphegarty@googlemail.com>]

Hi Per,

Thanks again for taking the time!

That sounds like an interesting idea. I have to admit my ignorance here. I've avoided using any sync so far, as the loop lengths involved are rarely the same twice, and I was finding the 8th note count a bit of a nightmare. So I'm effectively syncing purely by setting the SUS commands to precisely the right length. I'm now wondering if that's not the optimal solution, and perhaps I'm missing out on harnessing some of the power of the EDPs. Would I need to change the 8th note count before recording each loop in order to get them to be the right length?

Another knowledge black spot, would changing the pre-delay have any effect on the timing of the looping actions? Perhaps causing the loops to trigger earlier than they should be?

Thanks

Daniel

2009/5/31 Per Boysen <perboysen@gmail.com>

My totally uneducated guess is that you are partially right when
saying that it's "too much for Logic to handle" but I think the catch
is that Logic doesn't manage to handle it all in time. Especially if
MIDI is quantized in Logic. If this assumption is correct it may help
to "pre delay" the MIDI track in order to make sure all MIDI events
get sent out in time. If using Quantize in the EDP the MIDI can arrive
a healthy bit early without interfering with the music. Just a wild
guess, you may have tried that trick already?

Per



On Sun, May 31, 2009 at 8:40 PM, Daniel Hegarty

<danielphegarty@googlemail.com> wrote:
> 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
>>>
>>
>
>