Terrible midi latency

Question

Level 1

8 points

Terrible midi latency

Half a second latency when playing midi keyboard, and also notes are about half a second late in recording.

Always have low latency mode on, by default, always worked fine. Suddenly midi delay gets terrible, don't know why, using Logic for ±10 yrs. Restarted Logic. Rebooted Mac. Restarted core audio. Restarted audio interface. Changed low latency delay limit. Changed output buffer size. Reset Logic settings. No change.

When turning off the slowest plug in in the output chain (izotope ozone 7) playback is fine again.

But recorded notes still have an anti-social long delay.

Latency does get a lot less when turning all plugins off in the output channel. But before, this was handled by "low latency" button. Not anymore. Button don't make diff. Low latency button is not working anymore?

Interface: focusrite saffire 56. Keyboard: Midi over USB. No other programs open (just safari for this post).

MacBook Pro with Retina display, OS X El Capitan (10.11.6), null

Posted on Jun 4, 2017 6:19 AM

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Answer 1

Pancenter

Level 6

14,788 points

Jun 4, 2017 8:10 AM in response to Bas Groot

You only use Low Latency Mode when recording, correct. It should be off when mixing.

Do you have automatic updates enabled in System Preferences? Was the operating system updated recently?

Unplug your USB keyboard, shut down the computer (off) Wait a couple of minutes, restart the computer, do not plug in the keyboard yet. Let it settle, then plug the keyboard back in.

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Answer 2

Bas Groot Author

Level 1

8 points

Jun 5, 2017 10:00 AM in response to Pancenter

Hi, tried all that before even submitting. I made it go away - I think.

I used a drumkit from v10, called 'Italo Disco', this has something to do with it, (I suspect v10 kits rather than just this one). First playback went ok again when I once turned all plugins in the output ch off. And remained responsive when I turned the plugins back on. (Apparently this resets some time offset).

Then when recording, the delay was back (aargh), but only during recording, if rec was off, everything ok. Apparently playback and rec have different time offset params that can go wrong.

When I removed the v10 kit from my track list and started using an old Ultrabeat v9 kit instead, everything went ok again.

So this looks lika a bug with adaptive delay compensation.

Thinking back I've had simular stuff with audio recordings too when a recording was a very complex group of partially overlapping takes.

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Answer 3

Pancenter

Level 6

14,788 points

Jun 5, 2017 11:21 AM in response to Bas Groot

Are you using Aux's?

There are some plugins that Logic can't auto compensate for, Multipressor comes to mind, that's when Low Latency Mode is used, it bypasses the when recording so the recorded material is placed correctly.

Never heard of a drum kit causing that kind of latency.

Yes, there are different offsets between record/playback. Low Latency Mode should -always- be off on playback and only used when you have plugins that use "look ahead" technology.

I don't know about Apple's recent operating systems and Logic, seems to a wide variety of problems, and yet.... works ok for some.

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