Audio glitches with USB headset after upgrade to macOS Sierra 10.12.4

I've got the same issue with a USB Logitech H340 headset. Stuttering and choppy output regardless of source.

Tried it on different Mac's and even tried new headset new from package and same result. Works fine on 10.12.3.

Tried p-ram, 10.12.4 re-install and changing Audio Midi settings to no avail.

There's a new AudioAUUC.kext extension installed so it might be that one. I've raised a call with Apple so we'll see what they say.

I connect my old keyboard with numpad (http://www.apple.com/shop/product/MB110LL/B/apple-keyboard-with-numeric-keypad-u s-english?fnode=56) and connect my Plantronics A622 via USB port on keyboard - problem solved, headset working normally.

I will be waiting update from Apple and then return my favourite keyboard without cable.

Apple doesn’t routinely monitor the discussions. These are mostly user to user discussions.

Send Apple feedback. They won't answer, but at least will know there is a problem or a suggestion for change. If enough people send feedback, it may get the problem/suggested change solved sooner.

Feedback

Hi guys, I've had 3 live chats with Apple over the last 24 hours (I'm stuck at home with an injury so I have the time!).

I've been through their many steps (SMC, NVRAM, Safe Mode etc) to no avail.

However, just now, in the last chat the agent acknowledged the wider issue and said Apple engineers are working on a fix. He wouldn't guess timescales but said things tend to happen sooner the more feedback they get. Registering a "me too" on this page doesn't count.

So........give some feedback here https://www.apple.com/feedback/ or if you have the time, start a live chat with Apple on their support page.

It shouldn't have happened but fingers crossed for the fix.

Hi,

I have the same problem with Plantronics A622 on Imac 21,5 (Late 2012). After update on Sierra 10.12.4 my headset doesn't work normally, like your. Nothing actions help. And unfortunately i haven't timemachine backup ((

Same issue, same headset (Logitech H340 USB). Headset audio was fine until I installed 10.12.4.

Mac is a Mac Mini (Late 2012) and I've done a complete reinstall of Sierra 10.12.4 with no improvement. Audio wavers in and out several times a second; no problems with audio via the speakers or headphone jack.

Same problem here with NuForce µDAC 2. Same symptoms as described above. It worked perfectly in OS X pre El Capitan. Then whatever was broken with USB drivers in El Capitan, Apple fixed and it worked mostly fine until this latest Sierra 10.12.4 update. Now USB audio is broken and unusable again.

Wish Apple would do more of quality control and testing, instead of living off old glory...

I can confirm it's affecting the Logitech H340. My husband has an older high end Logitech headset which still works fine (tested both on my computer last night).

For now he's holding off upgrading his OS.

I have the same problem now after the update with my plantronics headset. But , if i plug the headset into my usb hub it seems to work fine. So I'm stuck using my unreliable usb hub until apple can get their act together

rjeffords wrote:

I wonder if this problem is in somewhat related to "skype certified headsets"? Personally I don't even know what that certification means, but I wonder if it's common thread here...

Probably not. I have a simple USB DAC, and have same problem. The common theme is USB. It's most likely something got broken in USB driver stack. OS X had troublesome support for USB audio devices ever since El Capitan was released.

I've ran the headset through a cheap 3port USB hub and can confirm it's working. Sound comes out ok.

The Logitech H340 also works through the USB port of a wired Apple keyboard.

The response from Logitech was that it's been widespread and wait for an OS X update.

All log files has been submitted to Apple and will get a response from them Monday.

I think we can expect an OS X update soon.

I can confirm if i use my old non powered usb 3.0 hub and connect my usb headset to it, it works fine . But my headset connected directly to the mac results in the audio problems. This didn't happen before the update, so the update must have caused some issue. I hope apple doesn't drag out on a fix, it needs to be fixed now! I feel shocked they would even release this update without testing these things

Using the Apple USB-C-Digital-AV-Multiport-Adapter with the problematic headphone results in no audio distortions, but if i use my Kanex USB-C to USB adapter, I have the audio issues.

I think there is something else going on and Apple is to blame for bugging the driver theses headphone rely on.