Good morning,
I installed the el capitan system on my mac. My mixer djm 450 has been behaving very strangely since then. When you plug it in via the usb to the mac, the sound is terribly distorted, crackles, noises, and noises appear. It's like that on every program: safari, itunes, rekordbox, tractor ... I'm pasting you tube with a movie that shows how the mixer reacted when in the sound settings in mac I chose djm 450 as a built-in usb audio device. The sound immediately turned into something terrible. I have a new mixer, I did not notice such a situation on the previous Maverick system. Do you have any idea? I've tried everything, the drivers have the latest, it's not the fault of the speakers (I checked) I am asking for help.
https://www.youtube.com/watch?v=n8Cg_FMIbH0
details of my equipment:
System OS X 10.11 El Capitan
DJM 450 - FIRMWARE 1.04 (with 1,03 firmware, continue with the same problem)
Macbook Pro 13" 2009
DJM-450 Utility Ver.2.1.2
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The problem is likely that El Cap is more taxing on your computer than Mavericks was, and it sounds like the audio buffer is running out. Have you tried using DJ software to see if that occurs when adjusting the buffer size?
I checked the buffer in Rekordbox DJ and Traktor Scratch Pro 2, how much I would not set - the problem is the same :( I returned to the Yosemite system and everything works as it should be. Something with this El Capitan is not cool.
Thanks, best regards