How to get sound : Simple working suggestion.

[eversiege]

Discussed in #138

^{Originally posted by knxwille October 31, 2024}
If your macos have no sound, try this
put a "#" front of -device ich9-intel-hda -device hda-duplex line
write this line
-audio driver=sdl,model=virtio

[chefnaphtha]

apparently, this works. i don't know why, as i couldn't find any mention of macos having virtio drivers. maybe it's one of the opencore kexts?

[svensen]

Recent macOS releases have native support for virtio (-net, -sound, -vga, -disks) The only thing that doesn't work is virtiofs.

[chefnaphtha]

there is one small issue: i use this method to get bluetooth audio from macos as my bluetooth adapter doesn't work in macos (and i also have other audio-producing guests running on the host)

whenever the host switches the output to another bluetooth device, there is some audio latency (about 1 second) introduced on the macos side, the host and windows guests don't have any delay. macos recovers after some time (~30 min) and the latency returns to normal

any ideas?

domain xml

<domain type='kvm' id='6' xmlns:qemu='http://libvirt.org/schemas/domain/qemu/1.0'>
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  <uuid>9448e43d-8887-4445-bca6-7a6a83efa576</uuid>
  <description>  macOS Sequoia
  </description>
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  <currentMemory unit='KiB'>33554432</currentMemory>
  <vcpu placement='static'>10</vcpu>
  <resource>
    <partition>/machine</partition>
  </resource>
  <os>
    <type arch='x86_64' machine='pc-q35-4.2'>hvm</type>
    <loader readonly='yes' type='pflash'>/home/naphtha/ultimate-macOS-KVM/ovmf/OVMF_CODE.fd</loader>
    <nvram>/home/naphtha/ultimate-macOS-KVM/ovmf/ultmos-15-gpu_VARS.fd</nvram>
    <boot dev='hd'/>
  </os>
  <features>
    <acpi/>
    <apic/>
  </features>
  <cpu mode='host-passthrough' check='none' migratable='on'/>
  <clock offset='utc'>
    <timer name='rtc' tickpolicy='catchup'/>
    <timer name='pit' tickpolicy='delay'/>
    <timer name='hpet' present='no'/>
  </clock>
  <on_poweroff>destroy</on_poweroff>
  <on_reboot>restart</on_reboot>
  <on_crash>restart</on_crash>
  <devices>
    <emulator>/usr/bin/qemu-system-x86_64</emulator>
    <disk type='file' device='disk'>
      <driver name='qemu' type='qcow2'/>
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    </disk>
    <disk type='file' device='disk'>
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    <controller type='pci' index='2' model='pcie-root-port'>
      <model name='pcie-root-port'/>
      <target chassis='2' port='0x9'/>
      <alias name='pci.2'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/>
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      <model name='pcie-root-port'/>
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    <controller type='pci' index='4' model='pcie-root-port'>
      <model name='pcie-root-port'/>
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      <model name='pcie-root-port'/>
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    </controller>
    <controller type='pci' index='6' model='pcie-root-port'>
      <model name='pcie-root-port'/>
      <target chassis='6' port='0xd'/>
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      <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x5'/>
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    <controller type='pci' index='7' model='pcie-root-port'>
      <model name='pcie-root-port'/>
      <target chassis='7' port='0xe'/>
      <alias name='pci.7'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x6'/>
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    <controller type='pci' index='8' model='pcie-root-port'>
      <model name='pcie-root-port'/>
      <target chassis='8' port='0xf'/>
      <alias name='pci.8'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x7'/>
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    <controller type='pci' index='9' model='pcie-to-pci-bridge'>
      <model name='pcie-pci-bridge'/>
      <alias name='pci.9'/>
      <address type='pci' domain='0x0000' bus='0x01' slot='0x00' function='0x0'/>
    </controller>
    <controller type='usb' index='0' model='ich9-ehci1'>
      <alias name='usb'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x1d' function='0x7'/>
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    <controller type='usb' index='0' model='ich9-uhci1'>
      <alias name='usb'/>
      <master startport='0'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x1d' function='0x0' multifunction='on'/>
    </controller>
    <controller type='usb' index='0' model='ich9-uhci2'>
      <alias name='usb'/>
      <master startport='2'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x1d' function='0x1'/>
    </controller>
    <controller type='usb' index='0' model='ich9-uhci3'>
      <alias name='usb'/>
      <master startport='4'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x1d' function='0x2'/>
    </controller>
    <interface type='bridge'>
      <mac address='00:16:cb:26:c9:fe'/>
      <source bridge='br0'/>
      <target dev='vnet5'/>
      <model type='vmxnet3'/>
      <alias name='net0'/>
      <address type='pci' domain='0x0000' bus='0x09' slot='0x02' function='0x0'/>
    </interface>
    <serial type='pty'>
      <source path='/dev/pts/8'/>
      <target type='isa-serial' port='0'>
        <model name='isa-serial'/>
      </target>
      <alias name='serial0'/>
    </serial>
    <console type='pty' tty='/dev/pts/8'>
      <source path='/dev/pts/8'/>
      <target type='serial' port='0'/>
      <alias name='serial0'/>
    </console>
    <input type='mouse' bus='ps2'>
      <alias name='input0'/>
    </input>
    <input type='keyboard' bus='ps2'>
      <alias name='input1'/>
    </input>
    <sound model='virtio' streams='2'>
      <alias name='sound0'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x1b' function='0x0'/>
    </sound>
    <audio id='1' type='pulseaudio'>
      <input mixingEngine='no'/>
      <output mixingEngine='no'/>
    </audio>
    <hostdev mode='subsystem' type='pci' managed='yes'>
      <driver name='vfio'/>
      <source>
        <address domain='0x0000' bus='0x10' slot='0x00' function='0x0'/>
      </source>
      <alias name='hostdev0'/>
      <address type='pci' domain='0x0000' bus='0x02' slot='0x00' function='0x0'/>
    </hostdev>
    <hostdev mode='subsystem' type='pci' managed='yes'>
      <driver name='vfio'/>
      <source>
        <address domain='0x0000' bus='0x10' slot='0x00' function='0x1'/>
      </source>
      <alias name='hostdev1'/>
      <address type='pci' domain='0x0000' bus='0x03' slot='0x00' function='0x0'/>
    </hostdev>
    <watchdog model='itco' action='poweroff'>
      <alias name='watchdog0'/>
    </watchdog>
    <memballoon model='none'/>
  </devices>
  <seclabel type='dynamic' model='dac' relabel='yes'>
    <label>+1000:+1000</label>
    <imagelabel>+1000:+1000</imagelabel>
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    <qemu:arg value='isa-applesmc,osk=ourhardworkbythesewordsguardedpleasedontsteal(c)AppleComputerInc'/>
    <qemu:arg value='-smbios'/>
    <qemu:arg value='type=2'/>
    <qemu:arg value='-cpu'/>
    <qemu:arg value='Haswell-noTSX,kvm=on,vendor=GenuineIntel,+invtsc,vmware-cpuid-freq=on,+ssse3,+sse4.2,+popcnt,+avx,+aes,+xsave,+xsaveopt,+vmx,+rdtscp,check'/>
    <qemu:arg value='-global'/>
    <qemu:arg value='nec-usb-xhci.msi=off'/>
    <qemu:arg value='-object'/>
    <qemu:arg value='input-linux,id=input1,evdev=/dev/input/by-id/uinput-persist-keyboard0,grab_all=on,repeat=on'/>
    <qemu:arg value='-object'/>
    <qemu:arg value='input-linux,id=input2,evdev=/dev/input/by-id/uinput-persist-mouse0'/>
    <qemu:arg value='-global'/>
    <qemu:arg value='kvm-amd.nested=1'/>
    <qemu:arg value='-global'/>
    <qemu:arg value='kvm-amd.svm=on'/>
    <qemu:env name='PIPEWIRE_RUNTIME_DIR' value='/run/user/1000'/>
    <qemu:env name='PIPEWIRE_LATENCY' value='512/48000'/>
    <qemu:env name='XDG_RUNTIME_DIR' value='/run/user/1000'/>
  </qemu:commandline>
</domain>