Sudden delay when monitoring/recording guitar in Logic X

Just because it has been 3 weeks and there has not been an answer:

I really want to point out how annoying this problem is, I can't record without Logic Pro X being unresponsive. It disturbs the workflow immensely and it is a new occurance since upgrading my OS to 10.11.3. I am also using a mid 2012 Retina MBP so there might be a connection there? I really, really, really( ! ) don't want to buy another expensive piece of hardware just because Logic is lagging terribly while recording (especially after buying the 16GB model at the time to make it somewhat future proof). Buffer size doesnt make a difference and the low latency mode is just as useless for this problem.

Apple, please fix?

Greetings

Hey-- I'm having the same issue. I'm using imac i7 for Logic Pro 9 with a Roland UA-25 EX interface. When playing (monitoring) or recording guitar: everything starts out fine... then suddenly a several second delay between my live guitar and the monitor pops up. The only way I can "fix" it is to stop the monitor or the recording, and restart from the beginning (sometimes several times before it gets back in sync).

The easiest way for me is to change the core audio back and forth. Does the trick for at least 5 minutes. But a Logic Update came out today, so I hope it addresses that issue. Are you using "Guitarrig" too? (or native instruments plug ins?) I only read from people that use NI software that have that problem...😐

Same problem here, driving me crazy! I've reset the prefs as follows

Maybe this will help, I've also been resetting the buffer forever, so the delay goes away, but it's not just annoying, it's unusable to record as you never know when it will happen, I also get random speed shifts where the audio will go off on a tangent, especially if I use varispeed, Apple, please fix this, I wouldn't even dream of using Logic in a pro situation as it is!

Why do you have the Output Device set to System Setting... set it to the Scarlett, you are monitoring through the Scarlett aren't you? Hopefully not through the cheap $2 onboard audio chip.

Monitor directly through the Scarlett and see if you still have the problem.

Also set the Multithreading Option to "Playback Tracks"