Dropouts of Audio via USB to a DAC

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Level 1

4 points

Dropouts of Audio via USB to a DAC

Saw this tonight. New behavior. Drops the USB connection randomly: default 17:39:00.703464-0400 kernel USB Sound assertion (Output Fell Behind) in /System/Volumes/Data/SWE/macOS/BuildRoots/5f3ad454b9/Library/Caches/com.apple.xbs/Sources/AppleUSBAudio/AppleUSBAudio-405.39/KEXT/AppleUSBAudioDevice.cpp at line 6704

default 17:39:00.769763-0400 icdd [Removed] | [USB][ LA-QXD1 ] ( 0, 0, 0) @ 0x14300000 |

default 17:39:00.769834-0400 icdd [Removed] | [USB][ LA-QXD1 ] (fe, 1, 1) @ 0x14300000 |

default 17:39:00.769866-0400 icdd [Removed] | [USB][ LA-QXD1 ] ( 1, 2,20) @ 0x14300000 |

default 17:39:00.769901-0400 icdd [Removed] | [USB][ LA-QXD1 ] ( 1, 1,20) @ 0x14300000 |

error 17:39:00.771086-0400 coreaudiod HALS_IOA1Engine::EndWriting: got an error from the kernel trap, Error: 0xE00002C2

default 17:39:00.771136-0400 Music HALC_ProxyIOContext::IOWorkLoop: skipping cycle due to overload

default 17:39:00.771176-0400 kernel + IOAudioDevice[<private>]::willTerminate(<private>, 1)

error 17:39:00.771455-0400 coreaudiod HALS_IOA1Engine::_StopIO: the call to the driver failed, Error: 0xE00002C2

default 17:39:00.771481-0400 coreaudiod HALC_IOContext_PauseIO(958)

default 17:39:00.771533-0400 coreaudiod HALC_IOContext_ResumeIO(958)

default 17:39:00.771591-0400 coreaudiod HALC_ProxyIOContext::PauseIO: -> 0 0 id:958 called from <private>

default 17:39:00.771610-0400 coreaudiod HALC_ProxyIOContext::PauseIO: <- 0 1 id:958

default 17:39:00.771626-0400 coreaudiod HALC_ProxyIOContext::ResumeIO: -> 0 1 id:958 called from <private>

default 17:39:00.772622-0400 coreaudiod HALS_Device::_Deactivate: deactivating device 947: AppleUSBAudioEngine:SONCOZ:LA-QXD1:14300000:1

default 17:39:00.771640-0400 coreaudiod HALC_ProxyIOContext::ResumeIO: <- 0 0 id:958

default 17:39:00.771994-0400 Music HALC_IOContext_PauseIO(961)

default 17:39:00.773646-0400 coreaudiod ===================================

default 17:39:00.771182-0400 kernel +-IOAudioEngine[<private>]::setState(0x0. oldState=0x1)

default 17:39:00.773668-0400 coreaudiod HALS_DefaultDeviceManager::CheckForChanges:

Anyone suggesting a solution is appreciated?

iMac 27″, macOS 11.7

Posted on Sep 9, 2024 3:25 PM

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Answer 1

den.thed

Level 10

82,462 points

Sep 9, 2024 4:51 PM in response to dgarten1

"HALC_ProxyIOContext::IOWorkLoop: skipping cycle due to overload"

Any number of things from a bad cable to... another device on the same USB bus could be causing an overload.

I would start by checking the (mA) draw of the DAC and of the other USB device on that same USB bus.

To do that, go to Apple > About This Mac > System Report.. > USB in the Hardware section.

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