Apple Logic Pro /LogicExpress Discussion

I keep hearing about latency.

Question:  Does this latency vary as the piece progresses?  If it does then what I am going 
to say next can be skipped over and go to the next paragraph.....

The latency problem has been around since the first sequencer I had-an Oby DSX.  It was 
not dealt with in the original software, as I recall, but new eproms came out with new 
features and you replaced the first eprom with the new chip.  So, if the bass patch was a 
tad draggy, move it up, etc, etc.  It was available in EditTrack, (when I moved to a 
computer sequencer in the mid 80's) and was easy to lock in the groove.  This is available 
in Logic also to put the track "in the pocket".  And like I say, if the time varies during the 
tune, forget this paragraph!  This "fix" is predicated on a clock/time that doesn't vary.

As to the OSX strip down:  I just posted that letter I found because it seemed to me that 
some of the problems were caused by a "confuser" that was overloaded so if you dump a 
few things, (like an Eastern Siberian Husky font) you might gain enough "umph" to make  
Logic work and not crash.  So far, I haven't had the problem but I haven't gone much past 
a simple SMF as I try to sort this beast out!

However, I believe I am going to stick with my outboard gear for a long time after seeing/
hearing all the problems. <g>  I am too old to blaze any more trails!!

Charlie

On Jan 30, 2005, at 6:51 PM, Charlie Massey wrote:

>
>  I keep hearing about latency.
>
>  Question:  Does this latency vary as the piece progresses?  If it 
> does then what I am going to say next can be skipped over and go to 
> the next paragraph.....

No it does not vary.


>  The latency problem has been around since the first sequencer I 
> had-an Oby DSX.  It was not dealt with in the original software, as I 
> recall, but new eproms came out with new features and you replaced the 
> first eprom with the new chip.  So, if the bass patch was a tad 
> draggy, move it up, etc, etc.  It was available in EditTrack, (when I 
> moved to a computer sequencer in the mid 80's) and was easy to lock in 
> the groove.  This is available in Logic also to put the track "in the 
> pocket".  And like I say, if the time varies during the tune, forget 
> this paragraph!  This "fix" is predicated on a clock/time that doesn't 
> vary.

The latency most people are talking about is monitoring latency.  
Monitoring latency is basically the time it takes for a signal to go 
into the analog to digital convertor receive whatever processing it is 
going to get and then get spat out the digital to analog convertor.  It 
is not really a problem of having what has been recorded line up 
accurately it is a question of when you play your instrument into the 
mic does the sound that comes into your headphones have a delay that is 
distracting enough to detract from your performance.  Does it have a 
delay that is large enough for a singer to notice distracting phase 
problems between his voice coming though his skull and his voice coming 
though his headphones.


> However, I believe I am going to stick with my outboard gear for a 
> long time after seeing/ hearing all the problems. <g>  I am too old to 
> blaze any more trails!!
>
It is getting better but if your system ain't broke.....

On Jan 30, 2005, at 8:18 PM, GAmoore@... wrote:

> Midi latency is known to vary. Its not just uniformly 30 ms late. it 
> might be 10 ms late here and 35 ms late there.

That is true.  I have not even thought about midi latency in ages.

There are devices like the Unitor that time stamp midi so if the device 
that is sending the midi to the unitor has consistent latency once it 
hits the unitor the midi events are given a time stamp that logic 
recognizes and will reproduce in the play back of virtual instruments 
in exactly the same place every time for the rest of eternity.

That is of course unless Logic Balsa gets into one of its "can't sync 
moods".

Hi.I just got an Ozonic from M-audio..I do hardware monitoring due to latency 
issues..Usb2 as well as firewire still can't compensate for latency.
>
> I have gotten the latency thing quite low.However I can still FEEL it when I 
do a guitar track..So I prefer hardware monitoring of audio as opposed to 
software monitoring.I also don't understand why I still read of people 
attempting to use USB when firewire is quicker and also is much more 
affordable then when first introduced.
>
  The OZ is a firewire keyboard with aftertouch and 4 analogue ins with 
hardware monitoring.
>
  I also have done some of the things mentioned in regards to the "stripping for 
speed"post..I did them prior to just going back thru the threads and reading 
what was reccomended.I also did not install the classic stuff..If nothing else It 
just gave me a LOT of GBs back..Don't know about the speed thing..I just don't 
want a lot of space taken up with stuff I'll never need..If I never see the classic 
OS9 window again I'll be happy.Also can't imagine when I'll need all the 
languages or the keyboard lay-out so to type in 18th century Pre Jing dynasty 
whatever..I have enough on my plate with enlish(the G is silent if you were  
wondering..
>
   There can occur sync issues when haveing a long song running in Logic(At 
least in 6).So I'm not sure if the original post made it exactly clear which type 
of latency was being inquired about..TMT

On Sunday, January 30, 2005, at 06:18 AM, GAmoore@... wrote:

> Midi latency is known to vary. Its not just uniformly 30 ms late. it 
> might be 10 ms late here and 35 ms late there.

That has more to do with the devices rather than the MIDI standard 
itself.

Eddie
IMS



>
> there will always be some form of audio latency - because it takes 
> time for processing to take place - until we have optical laser 
> computers instead of electricity based computers.
>
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