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Universal Audio Interface causing pops/clicks?
Last post Thu, Oct 15 2020 by stephen limbaugh, 4 replies.
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Posted on Fri, Feb 21 2020 23:33
by stephen limbaugh
Joined on Tue, Feb 23 2016, Los Angeles, Posts 260

I sent a support ticket to UAudio... anyone else experience something similar?

UAudio, I have a large orchestral Vienna Ensemble Pro AU3 template in Logic X and believe I have identified that my UAudio interface is locking up some real time processing during playback. Buffer size can be 512 or 1024, and I'll experience massive amounts of pops/clicks/distortion when playing back passages that contain lots of notes from my virtual instruments on my slave PC. CPU meters in Logic X are all low. CPU meters on PC slave are medium. CPU meters in the virtual instruments are medium. Disk speeds for these virtual instruments are all very good as well (624 MB/s... of course everything is on SSD drives). In Logic X Preferences, when I switch Output and Input devices to external headphones (instead of Universal Audio Thunderbolt), the problem goes away. Other settings include recording at 48kHz. My Universal Audio DSP reads 62%. Finally, I experienced some crashes when reconnecting my UAudio interface, which I have attached. A couple times, I received an odd error message during playback of one of these busy orchestral passages which required me to reboot, which I have also attached. Note, that I still have my UAD plugins active when I switch my Output/Input Devices to External Headphones and they do not seem to cause any problems.

2019 MacBook Pro, 8 core i9, 32gb RAM. Heavy Digital Audio PC slave, 6 core Xeon E5-1650, 128gb RAM. Logic 10.4.8. Mojave & Windows 10.
Posted on Sat, Feb 22 2020 00:12
by stephen limbaugh
Joined on Tue, Feb 23 2016, Los Angeles, Posts 260

Also, just tested a piece written with my AU3 Multiport template.  I'm able to go from 1024 buffer in Logic X with the Universal Audio interface as my Input/Output device, all the way down to a 32 buffer with it off and get no pops/clicks during playback [edit: 32 buffer when I use the built-in headphone jack]

2019 MacBook Pro, 8 core i9, 32gb RAM. Heavy Digital Audio PC slave, 6 core Xeon E5-1650, 128gb RAM. Logic 10.4.8. Mojave & Windows 10.
Posted on Wed, Oct 14 2020 21:36
by rverne10
Joined on Tue, May 26 2009, Michigan, USA, Posts 117

I assume you've found a solution to this?

I have the UA Apollo Twin USB 3.1 and had similar problems. I discovered they were related to missing some issues found on the Windows Setup - Required Settings page.

In particular, I had failed to disconnect two other sound systems that were preinstalled on the mainboard and monitor. 

Ray.

Cubase 10.5, Windows 10 64 bit version 1809, VE Pro (build 7.0.1056) Vienna Instruments Pro 2.0 (v 2.5.18635) Universal Audio Apollo Twin, M-Audio Oxygen 88 keyboard controller, USB connection, NVIDA GeForce GTX 1600 Ti Display adapter, Intel i7-8700K CPU @3.70 GHz, 32 GB RAM Total Physical Memory
Posted on Thu, Oct 15 2020 06:55
by stephen limbaugh
Joined on Tue, Feb 23 2016, Los Angeles, Posts 260

I actually never did... and still contend that there is some realtime processing issues with the Apollo.

Also, my master machine is a Mac not a PC. :) 

2019 MacBook Pro, 8 core i9, 32gb RAM. Heavy Digital Audio PC slave, 6 core Xeon E5-1650, 128gb RAM. Logic 10.4.8. Mojave & Windows 10.
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