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<< Solved >> Catalina made my USB audio interface buggy (Apogee Quartet)

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Hello everybody!

Have the same problem :(
During playing any audio sometimes gaps occurred. About 100-300 ms there are no sounds at all. Such gaps are occurred about 1 time per minute, sometimes less frequent.
I've noticed that on higher output audio frequencies the gaps occur more frequent. For example on 384kHz more frequent than on 96kHz.

macOS 10.15.2 (iMac19,1 SMBIOS)
GIGABYTE Z390 Aorus Elite
Intel Core i9-9900K + 32GB RAM
Radeon RX Vega 64
USB DAC FiiO K3

- Disabling iGPU doesn't solve the problem.
- Before updating to Catalina on Mojave there were no problems at all.
- Freeing RAM lowers the frequency of breaks.
 
Hello everybody!

Have the same problem :(
During playing any audio sometimes gaps occurred. About 100-300 ms there are no sounds at all. Such gaps are occurred about 1 time per minute, sometimes less frequent.
I've noticed that on higher output audio frequencies the gaps occur more frequent. For example on 384kHz more frequent than on 96kHz.

macOS 10.15.2 (iMac19,1 SMBIOS)
GIGABYTE Z390 Aorus Elite
Intel Core i9-9900K + 32GB RAM
Radeon RX Vega 64
USB DAC FiiO K3

- Disabling iGPU doesn't solve the problem.
- Before updating to Catalina on Mojave there were no problems at all.
- Freeing RAM lowers the frequency of breaks.
Try to turn the serial ports off from the bios. it works for me.
 
Can confirm on my Designaire Z170 Mobo turning off the serial port stopped the USB playback glitches in Catalina on my Presonus c24 USB Audio interface.
 
Last edited:
Double post, oops!
 
Can confirm on my Designaire Z170 Mobo turning off the serial port stopped the USB playback glitches in Catalina on my Presonus c24 USB Audio interface.

you know what? its pretty much fixed after doubling my ram and just getting my system running more efficiently, but happens occasionally when I have a lot of apps open. I'll try turning my serial port off too.
 
Can confirm on my Designaire Z170 Mobo turning off the serial port stopped the USB playback glitches in Catalina on my Presonus c24 USB Audio interface.

Same here, on a gigabyte Z270 board
 
after removing serial ports and disabling iGPU, my Scarlett 18i20 is working without issue. Thanks to everyone that posted.
 
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