Q: El Capitan USB audio problems.

I used your solution serbanescuraoul  for a Presonus Audiobox 22VSL and it worked as you said. As soon as I unplug the device I need to reset the NVRAM. It is pretty bad. I am using El Capitan 10.11.5 on a MacBookPro Retina 2012. If someone finds a solution to this please share.

Hey Stubbled,

Did this issue get fixed? I've been running Logic Pro X on Macbook Pro and using Zoom R16 as interface. I upgraded to El Capitan OS X last week and have been having all sorts of audio issues with the R16 since. Lots of hiss and fizz during playback etc. I basically can't use the interface. I updated Zoom drivers and it got a bit better, but it got really bad again last night. Any suggestions? The guy from Zoom told me there is basically no solution at the moment.

Thanks in advance of any tips!

I recently bought the irDAC II and it works good. A few times I noticed it switched of and then returns and works as it should. It seems Apple should sovle this problem asap

Like to add something:

Does anyone know if this problem also occurs when not using iTunes but another prgramme like Audirvana? Or doesn't make this any difference?

It shouldn't make any difference.

I bought a USB hub, with additional power support (from adapter). And my problem was solved.

Perhaps different powered USB hubs yield different results. In my case using a powered USB2 hub...nothing but problems. Removing the hub totally resolved the problem where I now have well over a month track record.

I am not sure if it necessarily a hub or not. I've had the problem with a powered hub to the Apple mainboard, an unpowered one and also a separate add-in USB3 PCI-x card

You can lose the audio signal when a system alert sound comes, when you've gone away and in other circumstances.

However, of course, it is more important adding SIRI to an operating system and purposefully shutting out old, but working systems, such as a Mac Pro 2009, that is still more powerful than a lot of products the iPhone company is coming out with.

Forgive my sour feeling. Apple has managed over the years to turn a "fanboy" or advocate into someone who suffers them. As long as my existing software works and machine can do its job I'm sold. The saving glory is they are not as s--t as Microsoft, yet, but they seem to be rushing in that direction.

Yes, more important for SIRI, so we can say "Hey siri why does Apple not care about pro users and a stable set of basic functions" to which it will answer that it doesn't understand and would I like to buy a pizza or some such nonsense.

I have several times to disconnect - connect xcore usb audio 2.0 device (XMOS) before Captain EL "see" the device.

How can this be cured?

I have been having similar problems with my KEF X300A active speakers that have built-in DACs. I tried switching cables, changing setting settings in Audio MIDI, switching to USB ports, turning off Bluetooth, turning off cell phones, other nearby computers, all to no avail.

I even tried using Yosemite partition.

The disconnects always appeared to be random, generally preceded by clicking noises from the left speaker. However, I seemed to be able to produce the issue by rapidly changing the volume level up-and-down with the keyboard.

I visited the KEF website and checked out their FAQ section. One of the things listed was to uncheck the options for, "Player user interface sound effects." I'm keeping my fingers crossed, but so far I haven't had any disconnects. I also unchecked the option for, "Play feedback when volume is changed."

Apple does not want to ignore the problems of its users.

It remains only one thing: a retreat to a mountain lion.

Steve Jobs, how we miss you!

I visited the KEF website and checked out their FAQ section. One of the things listed was to uncheck the options for, "Player user interface sound effects." I'm keeping my fingers crossed, but so far I haven't had any disconnects.

Nope, it didn't work, I had another disconnect today.

I have AudioEngine D1. It doesn't work with El Capitan either.

I wonder: Apple employees here and stare?

If you read the thread, you will see only the complaints of users. Each describes your problem. Hey! Software developers! Do not kill the legacy of Steve Jobs! Just a few years of such work, and we envy users of OS Windows.