LogicPro disconnects from audio interface

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Level 1

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LogicPro disconnects from audio interface

I have an issue where my audio interface (Komplete Audio 6) is disconnecting from Logic regularly while it was never happening before.

Unfortunately, I did 2 updates at the same time, so I don't know the culprit:

Updated Logic to 10.4.4 from 10.4.3
Updated MacOS to 10.14.3 Beta (18D39a)

Before these updates, there were never any problem like this. Right now, I need to physically unplug the USB cable and re-plug it for CoreAudio to restart.

There is nothing related to USB ports / CoreAudio in the console log.

I'm wondering if it could be some aggressive power save on the USB ports with the last version of MacOS, but it's just speculation.

Has anyone experienced something similar?

Posted on Jan 23, 2019 1:57 PM

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Answer 1

Top-ranking reply

Pancenter

Level 6

14,788 points

Jan 24, 2019 10:51 AM in response to ThomasD3

Have you reinstalled the driver? Last updated in 2011?

The reason I outlined that procedure is occasionally the OS USB drivers don't get fully updated during an OS update if the interface is plugged in. I'm not saying it's going to work, but worth a try.

Mojave is a bit of a dog for Audio, lot of problems being reported. Apple is trying to get iOS and MacOS under a single development platform, ir so I've heard. Which to me means neither OS is going to be as efficient as it could be.

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Answer 2

octopi

Level 4

3,630 points

Jan 24, 2019 5:32 AM in response to ThomasD3

Hate frustrating problems like this!!

Did you do exactly what Pancenter said? i.e. unplugging the audio interface and shutting down the Mac, leaving it a few minutes, rebooting from cold, let the Mac boot properly (give it another couple of minutes) and then plugging the audio interface back in?

A cold boot is very different from a restart and doing those steps may help you. It may not, and, you may have already followed Pancenter's advice, in which case apologies.

In this case I'd maybe even reset the PRAM too.

If the interface is still getting disconnected after this then I very much suspect that something has changed in CoreAudio in the OS update and reverting to your backup of the previous OS may be the only thing to help you at this stage.

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Answer 3

Pancenter

Level 6

14,788 points

Jan 23, 2019 3:50 PM in response to ThomasD3

Did you update the OS with the Interface plugged in?

If so, unplug the interface, shut down the computer, wait a couple of minutes then restart it, after it settles, reboot it for good measure. After it has re-booted let it settle then plug the interface back in. May not do anything but worth a try.

Why do people update applications and Operating systems... to a Beta no less, you get what you deserve man!

The universe has certain laws. :-) Did you back up the Logic application? What did the updates have that you absolutely needed?

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Answer 4

Pancenter

Level 6

14,788 points

Jan 24, 2019 9:19 PM in response to ThomasD3

https://www.native-instruments.com/en/support/downloads/drivers-other-files/

Scroll down to Komplete Audio 6

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Answer 5

ThomasD3 Author

Level 1

46 points

Jan 25, 2019 12:45 AM in response to Pancenter

I just reinstalled it, so we'll see how it goes.

Something interesting: While logic can't see the interface without me un-plugging / re-plugging it, the firmware update tool had no problem to find the device.

So the device is blinking like it's not connected to the computer, logic doesn't see it but the update tool sees it..

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Answer 6

ThomasD3 Author

Level 1

46 points

Jan 24, 2019 3:04 AM in response to Pancenter

I've restarted all equipment to see, but that didn't change anything.

Regarding updates, it's quite easy:

Logic hasn't has a single bug free version since it exists, so I welcome every update, hoping for the best.

And regarding the OS, I have a game that had display glitches with the last version of Mojave and wanted to see if an update fixed that (and it didn't).

In the past, CoreAudio would crash sometimes and randomly take logic with it, or not.

But in this case, it doesn't look like CoreAudio has a problem, it looks like the interface just gets disconnected and it requires a full un-plug / re-plug to be recognized again. When it happens, the interface's LED behave as if there was no computer attached to it.

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Answer 7

ThomasD3 Author

Level 1

46 points

Jan 24, 2019 2:14 PM in response to Pancenter

Are you talking about the CoreAudio driver? I didn't know if was something I could install separately.

I found in the end that there are console messages:

HALS_OverloadMessage.cpp:165:perform:  Audio IO Overload inputs: 'AppleUSBAudioEngine:Native Instruments:Komplete Audio 6:A48:1,2' outputs: 'AppleUSBAudioEngine:Native Instruments:Komplete Audio 6:A48:1,2' cause: 'Unknown' prewarming: no recovering: no
ALS_IOA1Engine.cpp:365:EndWriting:  HALS_IOA1Engine::EndWriting: got an error from the kernel trap, Error: 0xE00002EE

There are a couple pages of this.

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LogicPro disconnects from audio interface

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