USB audio device loses output connection

I use a MobilePRE USB interface and had no problems until recently. My iMac is set to never sleep but if I do not use the computer for a few hours the output from the MobilePre is gone.If I change to the driver to the internal headphone output on the Mac all is fine but in order to use the MobilePre as output I must restart, then it is fine until the next day or a few hour later.
The same time that this problem developed, about a month ago, I also noticed a low level snap or popping sound. This happens through my external speakers and is triggered by any sound activity approximately 30 seconds later. It even happens with the volume turned all the way down and sounds like a connection is being made. Like I said these two problems started about a month ago around the time Apple was sending a lot of updates. I have read a long thread on the OSX forum and know this is a pervasive problem with no solution yet. I mention it here as a curiosity as it started around the same time as the USB audio device problem. My hunch is that it has something to do with a recent update.
I don't think this is a GarageBand problem because it is the same no matter what software is outputting. I ask on this forum because there some knowledgeable audio heads here.

Check the archlinux news item which calls for an entry in kernel commandline .................

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    KERNEL[409.023611] remove /devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1/4-1.2.1:1.0/0003:262A:10E1.0005/hidraw/hidraw0 (hidraw)
    KERNEL[409.023632] remove /devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1/4-1.2.1:1.0/0003:262A:10E1.0005 (hid)
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    KERNEL[409.023829] remove /devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1/4-1.2.1:1.1/sound/card1/pcmC1D1p (sound)
    KERNEL[409.023845] remove /devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1/4-1.2.1:1.1/sound/card1/pcmC1D0p (sound)
    KERNEL[409.023859] remove /devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1/4-1.2.1:1.1/sound/card1/controlC1 (sound)
    KERNEL[409.023869] remove /devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1/4-1.2.1:1.1/sound/card1 (sound)
    KERNEL[409.023885] remove /devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1/4-1.2.1:1.1 (usb)
    KERNEL[409.023899] remove /devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1/4-1.2.1:1.3 (usb)
    KERNEL[409.024517] remove /devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1 (usb)
    KERNEL[411.633928] add /devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1 (usb)
    KERNEL[411.634043] add /devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1/4-1.2.1:1.0 (usb)
    KERNEL[411.648482] add /devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1/4-1.2.1:1.0/0003:262A:10E1.0006 (hid)
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    KERNEL[411.649347] add /devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1/4-1.2.1:1.0/0003:262A:10E1.0006/hidraw/hidraw0 (hidraw)
    KERNEL[411.657385] add /devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1/4-1.2.1:1.1 (usb)
    KERNEL[411.680527] add /devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1/4-1.2.1:1.1/sound/card1 (sound)
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    KERNEL[411.680951] add /devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1/4-1.2.1:1.3 (usb)
    KERNEL[411.705251] change /devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1/4-1.2.1:1.1/sound/card1 (sound)
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    UDEV [409.001439] remove /devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1/4-1.2.1:1.0/input/input24/event18 (
    input)
    ACTION=remove
    DEVLINKS=/dev/input/by-id/usb-HiFimeDIY_Audio_SA9023_USB_Audio-event-if00 /dev/input/by-path/pci-0000:00:1d.0-usb-0:1.2
    .1:1.0-event
    DEVNAME=/dev/input/event18
    DEVPATH=/devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1/4-1.2.1:1.0/input/input24/event18
    ID_BUS=usb
    ID_INPUT=1
    ID_MODEL=SA9023_USB_Audio
    ID_MODEL_ENC=SA9023\x20USB\x20Audio
    ID_MODEL_ID=10e1
    ID_PATH=pci-0000:00:1d.0-usb-0:1.2.1:1.0
    ID_PATH_TAG=pci-0000_00_1d_0-usb-0_1_2_1_1_0
    ID_REVISION=0001
    ID_SERIAL=HiFimeDIY_Audio_SA9023_USB_Audio
    ID_TYPE=hid
    ID_USB_DRIVER=usbhid
    ID_USB_INTERFACES=:030000:010100:010200:
    ID_USB_INTERFACE_NUM=00
    ID_VENDOR=HiFimeDIY_Audio
    ID_VENDOR_ENC=HiFimeDIY\x20Audio
    ID_VENDOR_ID=262a
    MAJOR=13
    MINOR=82
    SEQNUM=2036
    SUBSYSTEM=input
    USEC_INITIALIZED=4690
    UDEV [409.024376] remove /devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1/4-1.2.1:1.0/input/input24 (input)
    ACTION=remove
    DEVPATH=/devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1/4-1.2.1:1.0/input/input24
    EV=1
    ID_BUS=usb
    ID_FOR_SEAT=input-pci-0000_00_1d_0-usb-0_1_2_1_1_0
    ID_INPUT=1
    ID_MODEL=SA9023_USB_Audio
    ID_MODEL_ENC=SA9023\x20USB\x20Audio
    ID_MODEL_ID=10e1
    ID_PATH=pci-0000:00:1d.0-usb-0:1.2.1:1.0
    ID_PATH_TAG=pci-0000_00_1d_0-usb-0_1_2_1_1_0
    ID_REVISION=0001
    ID_SERIAL=HiFimeDIY_Audio_SA9023_USB_Audio
    ID_TYPE=hid
    ID_USB_DRIVER=usbhid
    ID_USB_INTERFACES=:030000:010100:010200:
    ID_USB_INTERFACE_NUM=00
    ID_VENDOR=HiFimeDIY_Audio
    ID_VENDOR_ENC=HiFimeDIY\x20Audio
    ID_VENDOR_ID=262a
    MODALIAS=input:b0003v262Ap10E1e0100-e0,kramlsfw
    NAME="HiFimeDIY Audio SA9023 USB Audio"
    PHYS="usb-0000:00:1d.0-1.2.1/input0"
    PRODUCT=3/262a/10e1/100
    PROP=0
    SEQNUM=2037
    SUBSYSTEM=input
    TAGS=:seat:
    UNIQ=""
    USEC_INITIALIZED=634532
    UDEV [409.024487] remove /devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1/4-1.2.1:1.0/0003:262A:10E1.0005/hid
    raw/hidraw0 (hidraw)
    ACTION=remove
    DEVNAME=/dev/hidraw0
    DEVPATH=/devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1/4-1.2.1:1.0/0003:262A:10E1.0005/hidraw/hidraw0
    MAJOR=248
    MINOR=0
    SEQNUM=2038
    SUBSYSTEM=hidraw
    USEC_INITIALIZED=9023681
    UDEV [409.026487] remove /devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1/4-1.2.1:1.0/0003:262A:10E1.0005 (hi
    d)
    ACTION=remove
    DEVPATH=/devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1/4-1.2.1:1.0/0003:262A:10E1.0005
    HID_ID=0003:0000262A:000010E1
    HID_NAME=HiFimeDIY Audio SA9023 USB Audio
    HID_PHYS=usb-0000:00:1d.0-1.2.1/input0
    MODALIAS=hid:b0003g0001v0000262Ap000010E1
    SEQNUM=2039
    SUBSYSTEM=hid
    USEC_INITIALIZED=23875
    UDEV [409.026531] remove /devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1/4-1.2.1:1.1/sound/card1/controlC1 (
    sound)
    ACTION=remove
    DEVLINKS=/dev/snd/by-id/usb-HiFimeDIY_Audio_SA9023_USB_Audio-01 /dev/snd/by-path/pci-0000:00:1d.0-usb-0:1.2.1:1.1
    DEVNAME=/dev/snd/controlC1
    DEVPATH=/devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1/4-1.2.1:1.1/sound/card1/controlC1
    ID_BUS=usb
    ID_MODEL=SA9023_USB_Audio
    ID_MODEL_ENC=SA9023\x20USB\x20Audio
    ID_MODEL_ID=10e1
    ID_PATH=pci-0000:00:1d.0-usb-0:1.2.1:1.1
    ID_PATH_TAG=pci-0000_00_1d_0-usb-0_1_2_1_1_1
    ID_REVISION=0001
    ID_SERIAL=HiFimeDIY_Audio_SA9023_USB_Audio
    ID_TYPE=audio
    ID_USB_DRIVER=snd-usb-audio
    ID_USB_INTERFACES=:030000:010100:010200:
    ID_USB_INTERFACE_NUM=01
    ID_VENDOR=HiFimeDIY_Audio
    ID_VENDOR_ENC=HiFimeDIY\x20Audio
    ID_VENDOR_ID=262a
    MAJOR=116
    MINOR=13
    SEQNUM=2043
    SUBSYSTEM=sound
    TAGS=:uaccess:
    USEC_INITIALIZED=665890
    UDEV [409.026557] remove /devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1/4-1.2.1:1.3 (usb)
    ACTION=remove
    DEVPATH=/devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1/4-1.2.1:1.3
    DEVTYPE=usb_interface
    ID_MODEL_FROM_DATABASE=USB-2.0 4-Port HUB
    ID_VENDOR_FROM_DATABASE=Genesys Logic, Inc.
    INTERFACE=1/2/0
    MODALIAS=usb:v262Ap10E1d0001dc00dsc00dp00ic01isc02ip00in03
    PRODUCT=262a/10e1/1
    SEQNUM=2046
    SUBSYSTEM=usb
    TYPE=0/0/0
    USEC_INITIALIZED=665944
    UDEV [409.026573] remove /devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1/4-1.2.1:1.0 (usb)
    ACTION=remove
    DEVPATH=/devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1/4-1.2.1:1.0
    DEVTYPE=usb_interface
    ID_MODEL_FROM_DATABASE=USB-2.0 4-Port HUB
    ID_VENDOR_FROM_DATABASE=Genesys Logic, Inc.
    INTERFACE=3/0/0
    MODALIAS=usb:v262Ap10E1d0001dc00dsc00dp00ic03isc00ip00in00
    PRODUCT=262a/10e1/1
    SEQNUM=2040
    SUBSYSTEM=usb
    TYPE=0/0/0
    USEC_INITIALIZED=130
    UDEV [409.026616] remove /devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1/4-1.2.1:1.1/sound/card1/pcmC1D0p (s
    ound)
    ACTION=remove
    DEVNAME=/dev/snd/pcmC1D0p
    DEVPATH=/devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1/4-1.2.1:1.1/sound/card1/pcmC1D0p
    MAJOR=116
    MINOR=12
    SEQNUM=2042
    SUBSYSTEM=sound
    TAGS=:uaccess:
    USEC_INITIALIZED=5836
    UDEV [409.078843] remove /devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1/4-1.2.1:1.1/sound/card1/pcmC1D1p (s
    ound)
    ACTION=remove
    DEVNAME=/dev/snd/pcmC1D1p
    DEVPATH=/devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1/4-1.2.1:1.1/sound/card1/pcmC1D1p
    MAJOR=116
    MINOR=11
    SEQNUM=2041
    SUBSYSTEM=sound
    TAGS=:uaccess:
    USEC_INITIALIZED=5794
    UDEV [409.079039] remove /devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1/4-1.2.1:1.1/sound/card1 (sound)
    ACTION=remove
    DEVPATH=/devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1/4-1.2.1:1.1/sound/card1
    ID_BUS=usb
    ID_FOR_SEAT=sound-pci-0000_00_1d_0-usb-0_1_2_1_1_1
    ID_ID=usb-HiFimeDIY_Audio_SA9023_USB_Audio-01-Audio
    ID_MODEL=SA9023_USB_Audio
    ID_MODEL_ENC=SA9023\x20USB\x20Audio
    ID_MODEL_FROM_DATABASE=USB-2.0 4-Port HUB
    ID_MODEL_ID=10e1
    ID_PATH=pci-0000:00:1d.0-usb-0:1.2.1:1.1
    ID_PATH_TAG=pci-0000_00_1d_0-usb-0_1_2_1_1_1
    ID_REVISION=0001
    ID_SERIAL=HiFimeDIY_Audio_SA9023_USB_Audio
    ID_TYPE=audio
    ID_USB_DRIVER=snd-usb-audio
    ID_USB_INTERFACES=:030000:010100:010200:
    ID_USB_INTERFACE_NUM=01
    ID_VENDOR=HiFimeDIY_Audio
    ID_VENDOR_ENC=HiFimeDIY\x20Audio
    ID_VENDOR_FROM_DATABASE=Genesys Logic, Inc.
    ID_VENDOR_ID=262a
    SEQNUM=2044
    SOUND_INITIALIZED=1
    SUBSYSTEM=sound
    SYSTEMD_WANTS=sound.target
    TAGS=:seat:systemd:
    USEC_INITIALIZED=5712
    UDEV [409.079517] remove /devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1/4-1.2.1:1.1 (usb)
    ACTION=remove
    DEVPATH=/devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1/4-1.2.1:1.1
    DEVTYPE=usb_interface
    ID_MODEL_FROM_DATABASE=USB-2.0 4-Port HUB
    ID_VENDOR_FROM_DATABASE=Genesys Logic, Inc.
    INTERFACE=1/1/0
    MODALIAS=usb:v262Ap10E1d0001dc00dsc00dp00ic01isc01ip00in01
    PRODUCT=262a/10e1/1
    SEQNUM=2045
    SUBSYSTEM=usb
    TYPE=0/0/0
    USEC_INITIALIZED=642712
    UDEV [409.085432] remove /devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1 (usb)
    ACTION=remove
    BUSNUM=004
    DEVNAME=/dev/bus/usb/004/010
    DEVNUM=010
    DEVPATH=/devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1
    DEVTYPE=usb_device
    ID_BUS=usb
    ID_MODEL=SA9023_USB_Audio
    ID_MODEL_ENC=SA9023\x20USB\x20Audio
    ID_MODEL_FROM_DATABASE=USB-2.0 4-Port HUB
    ID_MODEL_ID=10e1
    ID_REVISION=0001
    ID_SERIAL=HiFimeDIY_Audio_SA9023_USB_Audio
    ID_USB_INTERFACES=:030000:010100:010200:
    ID_VENDOR=HiFimeDIY_Audio
    ID_VENDOR_ENC=HiFimeDIY\x20Audio
    ID_VENDOR_FROM_DATABASE=Genesys Logic, Inc.
    ID_VENDOR_ID=262a
    MAJOR=189
    MINOR=393
    PRODUCT=262a/10e1/1
    SEQNUM=2047
    SUBSYSTEM=usb
    TYPE=0/0/0
    USEC_INITIALIZED=619842
    UDEV [411.697540] add /devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1 (usb)
    ACTION=add
    BUSNUM=004
    DEVNAME=/dev/bus/usb/004/011
    DEVNUM=011
    DEVPATH=/devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1
    DEVTYPE=usb_device
    ID_BUS=usb
    ID_MODEL=SA9023_USB_Audio
    ID_MODEL_ENC=SA9023\x20USB\x20Audio
    ID_MODEL_FROM_DATABASE=USB-2.0 4-Port HUB
    ID_MODEL_ID=10e1
    ID_REVISION=0001
    ID_SERIAL=HiFimeDIY_Audio_SA9023_USB_Audio
    ID_USB_INTERFACES=:030000:010100:010200:
    ID_VENDOR=HiFimeDIY_Audio
    ID_VENDOR_ENC=HiFimeDIY\x20Audio
    ID_VENDOR_FROM_DATABASE=Genesys Logic, Inc.
    ID_VENDOR_ID=262a
    MAJOR=189
    MINOR=394
    PRODUCT=262a/10e1/1
    SEQNUM=2048
    SUBSYSTEM=usb
    TYPE=0/0/0
    USEC_INITIALIZED=33928
    UDEV [411.699672] add /devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1/4-1.2.1:1.3 (usb)
    ACTION=add
    DEVPATH=/devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1/4-1.2.1:1.3
    DEVTYPE=usb_interface
    DRIVER=snd-usb-audio
    ID_MODEL_FROM_DATABASE=USB-2.0 4-Port HUB
    ID_VENDOR_FROM_DATABASE=Genesys Logic, Inc.
    INTERFACE=1/2/0
    MODALIAS=usb:v262Ap10E1d0001dc00dsc00dp00ic01isc02ip00in03
    PRODUCT=262a/10e1/1
    SEQNUM=2059
    SUBSYSTEM=usb
    TYPE=0/0/0
    USEC_INITIALIZED=80939
    UDEV [411.699773] add /devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1/4-1.2.1:1.0 (usb)
    ACTION=add
    DEVPATH=/devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1/4-1.2.1:1.0
    DEVTYPE=usb_interface
    ID_MODEL_FROM_DATABASE=USB-2.0 4-Port HUB
    ID_VENDOR_FROM_DATABASE=Genesys Logic, Inc.
    INTERFACE=3/0/0
    MODALIAS=usb:v262Ap10E1d0001dc00dsc00dp00ic03isc00ip00in00
    PRODUCT=262a/10e1/1
    SEQNUM=2049
    SUBSYSTEM=usb
    TYPE=0/0/0
    USEC_INITIALIZED=34043
    UDEV [411.699840] add /devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1/4-1.2.1:1.1 (usb)
    ACTION=add
    DEVPATH=/devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1/4-1.2.1:1.1
    DEVTYPE=usb_interface
    ID_MODEL_FROM_DATABASE=USB-2.0 4-Port HUB
    ID_VENDOR_FROM_DATABASE=Genesys Logic, Inc.
    INTERFACE=1/1/0
    MODALIAS=usb:v262Ap10E1d0001dc00dsc00dp00ic01isc01ip00in01
    PRODUCT=262a/10e1/1
    SEQNUM=2054
    SUBSYSTEM=usb
    TYPE=0/0/0
    USEC_INITIALIZED=57387
    UDEV [411.701367] add /devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1/4-1.2.1:1.0/0003:262A:10E1.0006 (hi
    d)
    ACTION=add
    DEVPATH=/devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1/4-1.2.1:1.0/0003:262A:10E1.0006
    HID_ID=0003:0000262A:000010E1
    HID_NAME=HiFimeDIY Audio SA9023 USB Audio
    HID_PHYS=usb-0000:00:1d.0-1.2.1/input0
    MODALIAS=hid:b0003g0001v0000262Ap000010E1
    SEQNUM=2050
    SUBSYSTEM=hid
    USEC_INITIALIZED=48481
    UDEV [411.701544] add /devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1/4-1.2.1:1.1/sound/card1 (sound)
    ACTION=add
    DEVPATH=/devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1/4-1.2.1:1.1/sound/card1
    ID_FOR_SEAT=sound-pci-0000_00_1d_0-usb-0_1_2_1_1_1
    ID_PATH=pci-0000:00:1d.0-usb-0:1.2.1:1.1
    ID_PATH_TAG=pci-0000_00_1d_0-usb-0_1_2_1_1_1
    SEQNUM=2055
    SUBSYSTEM=sound
    SYSTEMD_WANTS=sound.target
    TAGS=:seat:systemd:
    USEC_INITIALIZED=80503
    UDEV [411.702560] add /devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1/4-1.2.1:1.0/input/input25 (input)
    ACTION=add
    DEVPATH=/devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1/4-1.2.1:1.0/input/input25
    EV=1
    ID_BUS=usb
    ID_FOR_SEAT=input-pci-0000_00_1d_0-usb-0_1_2_1_1_0
    ID_INPUT=1
    ID_MODEL=SA9023_USB_Audio
    ID_MODEL_ENC=SA9023\x20USB\x20Audio
    ID_MODEL_ID=10e1
    ID_PATH=pci-0000:00:1d.0-usb-0:1.2.1:1.0
    ID_PATH_TAG=pci-0000_00_1d_0-usb-0_1_2_1_1_0
    ID_REVISION=0001
    ID_SERIAL=HiFimeDIY_Audio_SA9023_USB_Audio
    ID_TYPE=hid
    ID_USB_DRIVER=usbhid
    ID_USB_INTERFACES=:030000:010100:010200:
    ID_USB_INTERFACE_NUM=00
    ID_VENDOR=HiFimeDIY_Audio
    ID_VENDOR_ENC=HiFimeDIY\x20Audio
    ID_VENDOR_ID=262a
    MODALIAS=input:b0003v262Ap10E1e0100-e0,kramlsfw
    NAME="HiFimeDIY Audio SA9023 USB Audio"
    PHYS="usb-0000:00:1d.0-1.2.1/input0"
    PRODUCT=3/262a/10e1/100
    PROP=0
    SEQNUM=2051
    SUBSYSTEM=input
    TAGS=:seat:
    UNIQ=""
    USEC_INITIALIZED=49147
    UDEV [411.703227] add /devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1/4-1.2.1:1.1/sound/card1/pcmC1D0p (s
    ound)
    ACTION=add
    DEVNAME=/dev/snd/pcmC1D0p
    DEVPATH=/devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1/4-1.2.1:1.1/sound/card1/pcmC1D0p
    MAJOR=116
    MINOR=12
    SEQNUM=2057
    SUBSYSTEM=sound
    TAGS=:uaccess:
    USEC_INITIALIZED=80672
    UDEV [411.704394] add /devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1/4-1.2.1:1.0/0003:262A:10E1.0006/hid
    raw/hidraw0 (hidraw)
    ACTION=add
    DEVNAME=/dev/hidraw0
    DEVPATH=/devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1/4-1.2.1:1.0/0003:262A:10E1.0006/hidraw/hidraw0
    MAJOR=248
    MINOR=0
    SEQNUM=2053
    SUBSYSTEM=hidraw
    USEC_INITIALIZED=49353
    UDEV [411.705903] add /devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1/4-1.2.1:1.0/input/input25/event18 (
    input)
    ACTION=add
    DEVLINKS=/dev/input/by-id/usb-HiFimeDIY_Audio_SA9023_USB_Audio-event-if00 /dev/input/by-path/pci-0000:00:1d.0-usb-0:1.2
    .1:1.0-event
    DEVNAME=/dev/input/event18
    DEVPATH=/devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1/4-1.2.1:1.0/input/input25/event18
    ID_BUS=usb
    ID_INPUT=1
    ID_MODEL=SA9023_USB_Audio
    ID_MODEL_ENC=SA9023\x20USB\x20Audio
    ID_MODEL_ID=10e1
    ID_PATH=pci-0000:00:1d.0-usb-0:1.2.1:1.0
    ID_PATH_TAG=pci-0000_00_1d_0-usb-0_1_2_1_1_0
    ID_REVISION=0001
    ID_SERIAL=HiFimeDIY_Audio_SA9023_USB_Audio
    ID_TYPE=hid
    ID_USB_DRIVER=usbhid
    ID_USB_INTERFACES=:030000:010100:010200:
    ID_USB_INTERFACE_NUM=00
    ID_VENDOR=HiFimeDIY_Audio
    ID_VENDOR_ENC=HiFimeDIY\x20Audio
    ID_VENDOR_ID=262a
    MAJOR=13
    MINOR=82
    SEQNUM=2052
    SUBSYSTEM=input
    USEC_INITIALIZED=49330
    UDEV [411.714557] add /devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1/4-1.2.1:1.1/sound/card1/controlC1 (
    sound)
    ACTION=add
    DEVLINKS=/dev/snd/by-id/usb-HiFimeDIY_Audio_SA9023_USB_Audio-01 /dev/snd/by-path/pci-0000:00:1d.0-usb-0:1.2.1:1.1
    DEVNAME=/dev/snd/controlC1
    DEVPATH=/devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1/4-1.2.1:1.1/sound/card1/controlC1
    ID_BUS=usb
    ID_MODEL=SA9023_USB_Audio
    ID_MODEL_ENC=SA9023\x20USB\x20Audio
    ID_MODEL_ID=10e1
    ID_PATH=pci-0000:00:1d.0-usb-0:1.2.1:1.1
    ID_PATH_TAG=pci-0000_00_1d_0-usb-0_1_2_1_1_1
    ID_REVISION=0001
    ID_SERIAL=HiFimeDIY_Audio_SA9023_USB_Audio
    ID_TYPE=audio
    ID_USB_DRIVER=snd-usb-audio
    ID_USB_INTERFACES=:030000:010100:010200:
    ID_USB_INTERFACE_NUM=01
    ID_VENDOR=HiFimeDIY_Audio
    ID_VENDOR_ENC=HiFimeDIY\x20Audio
    ID_VENDOR_ID=262a
    MAJOR=116
    MINOR=13
    SEQNUM=2058
    SUBSYSTEM=sound
    TAGS=:uaccess:
    USEC_INITIALIZED=80812
    UDEV [411.759604] add /devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1/4-1.2.1:1.1/sound/card1/pcmC1D1p (s
    ound)
    ACTION=add
    DEVNAME=/dev/snd/pcmC1D1p
    DEVPATH=/devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1/4-1.2.1:1.1/sound/card1/pcmC1D1p
    MAJOR=116
    MINOR=11
    SEQNUM=2056
    SUBSYSTEM=sound
    TAGS=:uaccess:
    USEC_INITIALIZED=80575
    UDEV [411.760476] change /devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1/4-1.2.1:1.1/sound/card1 (sound)
    ACTION=change
    DEVPATH=/devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1/4-1.2.1:1.1/sound/card1
    ID_BUS=usb
    ID_FOR_SEAT=sound-pci-0000_00_1d_0-usb-0_1_2_1_1_1
    ID_ID=usb-HiFimeDIY_Audio_SA9023_USB_Audio-01-Audio
    ID_MODEL=SA9023_USB_Audio
    ID_MODEL_ENC=SA9023\x20USB\x20Audio
    ID_MODEL_FROM_DATABASE=USB-2.0 4-Port HUB
    ID_MODEL_ID=10e1
    ID_PATH=pci-0000:00:1d.0-usb-0:1.2.1:1.1
    ID_PATH_TAG=pci-0000_00_1d_0-usb-0_1_2_1_1_1
    ID_REVISION=0001
    ID_SERIAL=HiFimeDIY_Audio_SA9023_USB_Audio
    ID_TYPE=audio
    ID_USB_DRIVER=snd-usb-audio
    ID_USB_INTERFACES=:030000:010100:010200:
    ID_USB_INTERFACE_NUM=01
    ID_VENDOR=HiFimeDIY_Audio
    ID_VENDOR_ENC=HiFimeDIY\x20Audio
    ID_VENDOR_FROM_DATABASE=Genesys Logic, Inc.
    ID_VENDOR_ID=262a
    SEQNUM=2060
    SOUND_INITIALIZED=1
    SUBSYSTEM=sound
    SYSTEMD_WANTS=sound.target
    TAGS=:seat:systemd:
    USEC_INITIALIZED=80503
    the output of "sudo udevadm monitor" is:
    monitor will print the received events for:
    UDEV - the event which udev sends out after rule processing
    KERNEL - the kernel uevent
    KERNEL[10520.780009] remove /devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1/4-1.2.1:1.0/input/input24/event17 (input)
    UDEV [10520.783295] remove /devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1/4-1.2.1:1.0/input/input24/event17 (input)
    KERNEL[10520.789826] remove /devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1/4-1.2.1:1.0/input/input24 (input)
    KERNEL[10520.789859] remove /devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1/4-1.2.1:1.0/0003:262A:10E1.0005/hidraw/hidraw0 (hidraw)
    KERNEL[10520.789871] remove /devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1/4-1.2.1:1.0/0003:262A:10E1.0005 (hid)
    KERNEL[10520.789895] remove /devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1/4-1.2.1:1.0 (usb)
    KERNEL[10520.789965] remove /devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1/4-1.2.1:1.1/sound/card1/pcmC1D1p (sound)
    KERNEL[10520.789999] remove /devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1/4-1.2.1:1.1/sound/card1/pcmC1D0p (sound)
    KERNEL[10520.790031] remove /devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1/4-1.2.1:1.1/sound/card1/controlC1 (sound)
    KERNEL[10520.790473] remove /devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1/4-1.2.1:1.1/sound/card1 (sound)
    UDEV [10520.790483] remove /devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1/4-1.2.1:1.0/0003:262A:10E1.0005/hidraw/hidraw0 (hidraw)
    KERNEL[10520.790494] remove /devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1/4-1.2.1:1.1 (usb)
    UDEV [10520.790521] remove /devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1/4-1.2.1:1.0/input/input24 (input)
    KERNEL[10520.790533] remove /devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1/4-1.2.1:1.3 (usb)
    UDEV [10520.790543] remove /devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1/4-1.2.1:1.1/sound/card1/pcmC1D1p (sound)
    KERNEL[10520.790615] remove /devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1 (usb)
    UDEV [10520.790653] remove /devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1/4-1.2.1:1.1/sound/card1/pcmC1D0p (sound)
    UDEV [10520.790723] remove /devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1/4-1.2.1:1.1/sound/card1/controlC1 (sound)
    UDEV [10520.790843] remove /devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1/4-1.2.1:1.0/0003:262A:10E1.0005 (hid)
    UDEV [10520.790870] remove /devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1/4-1.2.1:1.1/sound/card1 (sound)
    UDEV [10520.791022] remove /devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1/4-1.2.1:1.3 (usb)
    UDEV [10520.791133] remove /devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1/4-1.2.1:1.1 (usb)
    UDEV [10520.791157] remove /devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1/4-1.2.1:1.0 (usb)
    UDEV [10520.795934] remove /devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1 (usb)
    KERNEL[10523.411837] add /devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1 (usb)
    KERNEL[10523.411961] add /devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1/4-1.2.1:1.0 (usb)
    KERNEL[10523.425856] add /devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1/4-1.2.1:1.0/0003:262A:10E1.0006 (hid)
    KERNEL[10523.426126] add /devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1/4-1.2.1:1.0/input/input25 (input)
    KERNEL[10523.426179] add /devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1/4-1.2.1:1.0/input/input25/event17 (input)
    KERNEL[10523.426268] add /devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1/4-1.2.1:1.0/0003:262A:10E1.0006/hidraw/hidraw0 (hidraw)
    KERNEL[10523.433989] add /devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1/4-1.2.1:1.1 (usb)
    KERNEL[10523.455486] add /devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1/4-1.2.1:1.1/sound/card1 (sound)
    KERNEL[10523.455508] add /devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1/4-1.2.1:1.1/sound/card1/pcmC1D1p (sound)
    KERNEL[10523.455540] add /devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1/4-1.2.1:1.1/sound/card1/pcmC1D0p (sound)
    KERNEL[10523.455580] add /devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1/4-1.2.1:1.1/sound/card1/controlC1 (sound)
    KERNEL[10523.455608] add /devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1/4-1.2.1:1.3 (usb)
    UDEV [10523.463039] add /devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1 (usb)
    UDEV [10523.464322] add /devices/pci0000:00/0000:00:1d.0/usb4/4-1/4-1.2/4-1.2.1/4-1.2.1:1.0 (usb)
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