Hello,
I am struggling to get audio passthrough working well on one of my Proxmox machines. I have tried USB and PCIe passthrough and in either case I get minor crackles on occasion, but it's a bit better when using PCIe passthrough although still not acceptable to me. I believe the devices are in separate PCIe groups. Also, I am familiar with audio production and recording. I do not think this is a sample rate or buffer issue, as it happens on all settings with both ASIO and WASAPI. I have noticed that the issue is worse if the buffer rate is really low, like if I was trying to monitor myself while recording. I do intend to try that at some point, but I'd like to get it working for normal playback at the moment.
Hardware:
Motherboard - H13sae-f
CPU - 7950x
RAM - 64GB 5200hz ECC
OS Drive - 250GB SATA Micron?
VM NVMe Drives - 2x 2TB Samsung 980 Pro LVM
VM Storage - 2x 4TB WD Red ZFS
GPU1 - Sapphire Pulse 7900xtx
GPU2 - Sapphire Pulse 7700xt
VM config w/ PCie Passthrough. The controller(s) are on 13.00.3 and 13.00.4. I've tried each and both at the same time.
Snippet of
Output of
Anyone have ideas on what to try? I tried to use device 14.00.0, which looks to also be in it's own group, but it crashes the host machine every time.
I am struggling to get audio passthrough working well on one of my Proxmox machines. I have tried USB and PCIe passthrough and in either case I get minor crackles on occasion, but it's a bit better when using PCIe passthrough although still not acceptable to me. I believe the devices are in separate PCIe groups. Also, I am familiar with audio production and recording. I do not think this is a sample rate or buffer issue, as it happens on all settings with both ASIO and WASAPI. I have noticed that the issue is worse if the buffer rate is really low, like if I was trying to monitor myself while recording. I do intend to try that at some point, but I'd like to get it working for normal playback at the moment.
Hardware:
Motherboard - H13sae-f
CPU - 7950x
RAM - 64GB 5200hz ECC
OS Drive - 250GB SATA Micron?
VM NVMe Drives - 2x 2TB Samsung 980 Pro LVM
VM Storage - 2x 4TB WD Red ZFS
GPU1 - Sapphire Pulse 7900xtx
GPU2 - Sapphire Pulse 7700xt
VM config w/ PCie Passthrough. The controller(s) are on 13.00.3 and 13.00.4. I've tried each and both at the same time.
Code:
agent: 1
args: -cpu 'host,-hypervisor,kvm=off'
balloon: 0
bios: ovmf
boot: order=scsi0
cores: 12
cpu: host
efidisk0: Samsung_2TB_2:vm-102-disk-1,efitype=4m,pre-enrolled-keys=1,size=4M
hostpci0: 0000:13:00.0,pcie=1,romfile=vbios_164E.dat,x-vga=1
hostpci1: 0000:13:00.1,pcie=1,romfile=AMDGopDriver.rom
hostpci2: 0000:13:00.4,pcie=1
hostpci3: 0000:13:00.3,pcie=1
ide0: local:iso/virtio-win.iso,media=cdrom,size=707456K
machine: pc-q35-9.0
memory: 12288
meta: creation-qemu=9.0.2,ctime=1732748150
name: Win11-AMD2
net0: virtio=BC:24:11:0F:B6:22,bridge=vmbr2,firewall=1
numa: 0
ostype: win11
scsi0: Samsung_2TB_2:vm-102-disk-0,discard=on,iothread=1,size=128G,ssd=1
scsi1: Samsung_2TB:vm-102-disk-0,backup=0,discard=on,iothread=1,size=256G,ssd=1
scsihw: virtio-scsi-single
smbios1: uuid=6d5cf138-726b-4d04-9bb9-ca9b49d79069
sockets: 1
tpmstate0: Samsung_2TB_2:vm-102-disk-2,size=4M,version=v2.0
vga: none
vmgenid: 819bad82-b5dc-42ef-b0d3-46442625b1f8Snippet of
lspci that includes all the USB controllers. Note, that I am passing through the AMD iGPU and audio controller as well. I have also tried passing through all of the separate 13.00 devices. I can't passthrough 13.00.2 though because the host will crash, despite it being in it's own group below.
Code:
10:00.0 USB controller: Advanced Micro Devices, Inc. [AMD] 600 Series Chipset USB 3.2 Controller (rev 01)
11:00.0 SATA controller: Advanced Micro Devices, Inc. [AMD] 600 Series Chipset SATA Controller (rev 01)
12:00.0 Non-Volatile memory controller: Samsung Electronics Co Ltd NVMe SSD Controller PM9A1/PM9A3/980PRO
13:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Raphael (rev c1)
13:00.1 Audio device: Advanced Micro Devices, Inc. [AMD/ATI] Rembrandt Radeon High Definition Audio Controller
13:00.2 Encryption controller: Advanced Micro Devices, Inc. [AMD] VanGogh PSP/CCP
13:00.3 USB controller: Advanced Micro Devices, Inc. [AMD] Device 15b6
13:00.4 USB controller: Advanced Micro Devices, Inc. [AMD] Device 15b7
13:00.5 Multimedia controller: Advanced Micro Devices, Inc. [AMD] ACP/ACP3X/ACP6x Audio Coprocessor (rev 62)
13:00.6 Audio device: Advanced Micro Devices, Inc. [AMD] Family 17h/19h HD Audio Controller
14:00.0 USB controller: Advanced Micro Devices, Inc. [AMD] Device 15b8Output of
find /sys/kernel/iommu_groups/ -type l
Code:
/sys/kernel/iommu_groups/17/devices/0000:03:00.1
/sys/kernel/iommu_groups/35/devices/0000:13:00.3
/sys/kernel/iommu_groups/7/devices/0000:00:03.0
/sys/kernel/iommu_groups/25/devices/0000:0b:00.0
/sys/kernel/iommu_groups/25/devices/0000:09:08.0
/sys/kernel/iommu_groups/15/devices/0000:02:00.0
/sys/kernel/iommu_groups/33/devices/0000:13:00.1
/sys/kernel/iommu_groups/5/devices/0000:00:02.1
/sys/kernel/iommu_groups/23/devices/0000:08:00.0
/sys/kernel/iommu_groups/13/devices/0000:00:18.3
/sys/kernel/iommu_groups/13/devices/0000:00:18.1
/sys/kernel/iommu_groups/13/devices/0000:00:18.6
/sys/kernel/iommu_groups/13/devices/0000:00:18.4
/sys/kernel/iommu_groups/13/devices/0000:00:18.2
/sys/kernel/iommu_groups/13/devices/0000:00:18.0
/sys/kernel/iommu_groups/13/devices/0000:00:18.7
/sys/kernel/iommu_groups/13/devices/0000:00:18.5
/sys/kernel/iommu_groups/31/devices/0000:12:00.0
/sys/kernel/iommu_groups/3/devices/0000:00:01.5
/sys/kernel/iommu_groups/21/devices/0000:06:00.1
/sys/kernel/iommu_groups/11/devices/0000:00:08.3
/sys/kernel/iommu_groups/1/devices/0000:00:01.1
/sys/kernel/iommu_groups/38/devices/0000:13:00.6
/sys/kernel/iommu_groups/28/devices/0000:09:0b.0
/sys/kernel/iommu_groups/18/devices/0000:04:00.0
/sys/kernel/iommu_groups/36/devices/0000:13:00.4
/sys/kernel/iommu_groups/8/devices/0000:00:04.0
/sys/kernel/iommu_groups/26/devices/0000:0c:00.0
/sys/kernel/iommu_groups/26/devices/0000:09:09.0
/sys/kernel/iommu_groups/16/devices/0000:03:00.0
/sys/kernel/iommu_groups/34/devices/0000:13:00.2
/sys/kernel/iommu_groups/6/devices/0000:00:02.2
/sys/kernel/iommu_groups/24/devices/0000:09:00.0
/sys/kernel/iommu_groups/24/devices/0000:0a:00.0
/sys/kernel/iommu_groups/24/devices/0000:0a:00.1
/sys/kernel/iommu_groups/14/devices/0000:01:00.0
/sys/kernel/iommu_groups/32/devices/0000:13:00.0
/sys/kernel/iommu_groups/4/devices/0000:00:02.0
/sys/kernel/iommu_groups/22/devices/0000:07:00.0
/sys/kernel/iommu_groups/12/devices/0000:00:14.3
/sys/kernel/iommu_groups/12/devices/0000:00:14.0
/sys/kernel/iommu_groups/30/devices/0000:11:00.0
/sys/kernel/iommu_groups/30/devices/0000:09:0d.0
/sys/kernel/iommu_groups/2/devices/0000:00:01.3
/sys/kernel/iommu_groups/20/devices/0000:06:00.0
/sys/kernel/iommu_groups/10/devices/0000:00:08.1
/sys/kernel/iommu_groups/39/devices/0000:14:00.0
/sys/kernel/iommu_groups/29/devices/0000:10:00.0
/sys/kernel/iommu_groups/29/devices/0000:09:0c.0
/sys/kernel/iommu_groups/0/devices/0000:00:01.0
/sys/kernel/iommu_groups/19/devices/0000:05:00.0
/sys/kernel/iommu_groups/37/devices/0000:13:00.5
/sys/kernel/iommu_groups/9/devices/0000:00:08.0
/sys/kernel/iommu_groups/27/devices/0000:09:0a.0
/sys/kernel/iommu_groups/27/devices/0000:0e:00.0
/sys/kernel/iommu_groups/27/devices/0000:0d:00.0Anyone have ideas on what to try? I tried to use device 14.00.0, which looks to also be in it's own group, but it crashes the host machine every time.