Audio Interface USB sizzling sound macos Catalina/ USB Passthrough not working.

La Matchata

Nov 24, 2020
I'm really new to proxmox/linux and virtualization.
I've installed macos and have a wworking gpu passthhough but i have an issue with my Audio Interface ( Scarlett 2i2). When a sound start ( like a notification or a video/music, the sound is horrible, saturated and sizzling.. So i can't use my interface with Logic..
I notice, the icon of audio volume is grey and i can't change him.
So i tried to pass the interface with his ID in Web GUI and trying to pass an entire port but it's not working. I tried to pass the onboard usb controller but it's work too..
I tried to add vfio kernel to the onboard USB 3 controller but same result..
So i don't know what i can do.. Maybe i do something wrong but i don't found an answer for these problems..
Thanks you for reading my post and for your further answer.

Here's my VM config:

args: -device isa-applesmc,osk="ourhardworkbythesewordsguardedpleasedontsteal(c)AppleC$
balloon: 0
bios: ovmf
boot: order=sata0;net0
cores: 8
cpu: Penryn
efidisk0: local-lvm:vm-103-disk-1,size=4M
hostpci0: 04:00,pcie=1,x-vga=1
hostpci1: 02:00
machine: q35
memory: 12288
name: catalina3
net0: vmxnet3=8E:90:E8:3E:FC:E7,bridge=vmbr0,firewall=1
numa: 0
ostype: other
sata0: local-lvm:vm-103-disk-0,cache=unsafe,discard=on,size=256G,ssd=1
scsihw: virtio-scsi-pci
smbios1: uuid=afbace1c-694b-4185-8bf4-9f5d3e815c99
sockets: 1
usb0: host=15ca:0101
usb1: host=046d:c53f
usb2: host=1235:8016
usb3: host=04f2:0841
vga: none
vmgenid: 95a8c50e-784f-4328-8812-4724880570ce

My PC specs:

Intel DX79TO
Xeon E5 1620
500GB HDD ( proxmox and VM are on it cause i just want to test it before deleting my files on the others disks to use them )
RX 480 ( for macos )
HD 7770 ( for host now but later assign to a Windows VM)

PS: I hope you understand me cause my english is very bad :) !


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