Hi,
I have trouble with qemu and bluetooth headphones. I have a sony bluetooth headphone that used LDAC codec with pipewire. Works great but at the very moment I start my windows VM it switches to mSBC codecs and my host system (tumbleweed) is forced to low quality audio.
My understanding is that QEMU does not currently supports pipewire. However I also dont understand why this quality switch is forced and what process does it.
If I switch back after my VM started I have no sound output. I need to stop the VM then only I can switch back to LDAC. So it is obviously QEMU interfering with the codecs.
My VM has the following setup for audio:
<sound model='ich9'>
<address type='pci' domain='0x0000' bus='0x00' slot='0x1b' function='0x0'/>
</sound>
<audio id='1' type='pulseaudio' serverName='/run/user/1000/pulse/native'/>
Supported codecs:
pactl list cards | grep -A20 "bluez_card"
Name: bluez_card.CC_98_8B_22_1E_D3
Driver: module-bluez5-device.c
Owner Module: n/a
Properties:
api.bluez5.address = "CC:98:8B:22:1E:D3"
api.bluez5.class = "0x240404"
api.bluez5.connection = "connected"
api.bluez5.device = ""
api.bluez5.icon = "audio-headset"
api.bluez5.path = "/org/bluez/hci0/dev_CC_98_8B_22_1E_D3"
bluez5.profile = "off"
device.alias = "WH-1000XM3"
device.api = "bluez5"
device.bus = "bluetooth"
device.description = "WH-1000XM3"
device.form_factor = "headset"
device.icon_name = "audio-headset-bluetooth"
device.name = "bluez_card.CC_98_8B_22_1E_D3"
device.product.id = "0x0cd3"
device.string = "CC:98:8B:22:1E:D3"
device.vendor.id = "usb:054c"
media.class = "Audio/Device"
spa.object.id = "0"
factory.id = "15"
client.id = "41"
object.id = "99"
object.serial = "1220"
Profiles:
off: Off (sinks: 0, sources: 0, priority: 0, available: yes)
a2dp-sink-sbc: High Fidelity Playback (A2DP Sink, codec SBC) (sinks: 1, sources: 0, priority: 18, available: yes)
a2dp-sink-sbc_xq: High Fidelity Playback (A2DP Sink, codec SBC-XQ) (sinks: 1, sources: 0, priority: 17, available: yes)
a2dp-sink-aac: High Fidelity Playback (A2DP Sink, codec AAC) (sinks: 1, sources: 0, priority: 19, available: yes)
a2dp-sink: High Fidelity Playback (A2DP Sink, codec LDAC) (sinks: 1, sources: 0, priority: 20, available: yes)
headset-head-unit-cvsd: Headset Head Unit (HSP/HFP, codec CVSD) (sinks: 1, sources: 1, priority: 2, available: yes)
headset-head-unit: Headset Head Unit (HSP/HFP, codec mSBC) (sinks: 1, sources: 1, priority: 3, available: yes)
Active Profile: headset-head-unit
Ports:
headset-input: Handsfree (type: Headset, priority: 0, latency offset: 0 usec, available)
Any help appreciated
