Hi Guys,
Hoping someone can help. I’ve got a Qudelix-T71 which is always stuck at -20db on the input setting. I contacted Qudelix and they said anything that supports UAC-1 and UAC-2 shouldn’t have this issue. Is there something I need to change in Pipewire settings to allow full support?
Clutching at straws really but hoping someone else might have had a similar experience.
Thanks in advance.
I literally just noticed and I helped find the udev ids on the Qudelix forum.
Your post over there was super helpful initially so thank you. Now if only we could solve this 
I found this can’t test now but may be of help.
https://bbs.archlinux.org/viewtopic.php?id=252602
If anyone with Pipewire or ALSA Knowledge want to help here’s what I get from wpctl inspect.
Device
id 53, type PipeWire:Interface:Device
alsa.card = "0"
alsa.card_name = "Qudelix-T71 2.0"
alsa.components = "USB1fc9:7302"
alsa.driver_name = "snd_usb_audio"
alsa.id = "Q20"
alsa.long_card_name = "Qudelix,Inc. Qudelix-T71 2.0 at usb-0000:4d:00.0-3, high speed"
alsa.mixer_name = "USB Mixer"
api.acp.auto-port = "false"
api.alsa.card = "0"
api.alsa.card.longname = "Qudelix,Inc. Qudelix-T71 2.0 at usb-0000:4d:00.0-3, high speed"
api.alsa.card.name = "Qudelix-T71 2.0"
api.alsa.path = "hw:0"
api.alsa.use-acp = "true"
api.dbus.ReserveDevice1 = "Audio0"
api.dbus.ReserveDevice1.Priority = "-20"
* client.id = "40"
* device.api = "alsa"
device.bus = "usb"
device.bus-id = "usb-Qudelix_Inc._Qudelix-T71_2.0_1.0.0-00"
device.bus-path = "pci-0000:4d:00.0-usb-0:3:1.0"
* device.description = "Qudelix-T71 2.0 "
device.enum.api = "udev"
device.icon-name = "audio-card-analog-usb"
* device.name = "alsa_card.usb-Qudelix_Inc._Qudelix-T71_2.0_1.0.0-00"
* device.nick = "Qudelix-T71 2.0"
device.plugged.usec = "7074637"
device.product.id = "0x7302"
device.product.name = "Qudelix-T71 2.0 "
device.serial = "Qudelix_Inc._Qudelix-T71_2.0_1.0.0"
device.string = "0"
device.subsystem = "sound"
device.sysfs.path = "/devices/pci0000:00/0000:00:02.1/0000:45:00.0/0000:46:0c.0/0000:4d:00.0/usb3/3-3/3-3:1.0/sound/card0"
device.vendor.id = "0x1fc9"
device.vendor.name = "NXP Semiconductors"
* factory.id = "14"
* media.class = "Audio/Device"
object.path = "alsa:pcm:0"
* object.serial = "468"
Sink
id 118, type PipeWire:Interface:Node
alsa.card = "0"
alsa.card_name = "Qudelix-T71 2.0"
alsa.class = "generic"
alsa.components = "USB1fc9:7302"
alsa.device = "0"
alsa.driver_name = "snd_usb_audio"
alsa.id = "Q20"
alsa.long_card_name = "Qudelix,Inc. Qudelix-T71 2.0 at usb-0000:4d:00.0-3, high speed"
alsa.mixer_name = "USB Mixer"
alsa.name = "USB Audio"
alsa.resolution_bits = "32"
alsa.subclass = "generic-mix"
alsa.subdevice = "0"
alsa.subdevice_name = "subdevice #0"
api.alsa.card.longname = "Qudelix,Inc. Qudelix-T71 2.0 at usb-0000:4d:00.0-3, high speed"
api.alsa.card.name = "Qudelix-T71 2.0"
api.alsa.path = "front:0"
api.alsa.pcm.card = "0"
api.alsa.pcm.stream = "playback"
audio.adapt.follower = ""
audio.channels = "2"
audio.position = "FL,FR"
card.profile.device = "1"
* client.id = "40"
clock.quantum-limit = "8192"
device.api = "alsa"
device.class = "sound"
* device.id = "53"
device.profile.description = "Analog Stereo"
device.profile.name = "analog-stereo"
device.routes = "1"
* factory.id = "18"
factory.mode = "merge"
factory.name = "api.alsa.pcm.sink"
library.name = "audioconvert/libspa-audioconvert"
* media.class = "Audio/Sink"
* node.description = "Qudelix-T71 2.0 Analog Stereo"
node.driver = "true"
* node.name = "alsa_output.usb-Qudelix_Inc._Qudelix-T71_2.0_1.0.0-00.analog-stereo"
* node.nick = "Qudelix-T71 2.0"
node.pause-on-idle = "false"
* object.path = "alsa:pcm:0:front:0:playback"
* object.serial = "810"
* priority.driver = "1009"
* priority.session = "1009"
EDIT
Here’s ALSA as well
> amixer -c$Q20
Simple mixer control 'Master',0
Capabilities: pvolume pswitch pswitch-joined
Playback channels: Front Left - Front Right
Limits: Playback 0 - 65536
Mono:
Front Left: Playback 65536 [100%] [on]
Front Right: Playback 65536 [100%] [on]
Simple mixer control 'Capture',0
Capabilities: cvolume cswitch cswitch-joined
Capture channels: Front Left - Front Right
Limits: Capture 0 - 65536
Front Left: Capture 65536 [100%] [on]
Front Right: Capture 65536 [100%] [on]
I use pulseaudio on pipewire, and as you can see :
pactl list sinks
Sink #296
State: SUSPENDED
Name: alsa_output.usb-Topping_E50-00.HiFi__hw_E50_0__sink
Description: E50 Headphones
Driver: PipeWire
Sample Specification: s32le 2ch 48000Hz
Channel Map: front-left,front-right
Owner Module: 4294967295
Mute: yes
Volume: front-left: 32662 / 50% / -18,15 dB, front-right: 32662 / 50% / -18,15 dB
balance 0,00
Base Volume: 65536 / 100% / 0,00 dB
Base Volume shows 0 dB for 100% of the volume.
Same here
Sink #229
State: SUSPENDED
Name: alsa_output.usb-Qudelix_Inc._Qudelix-T71_2.0_1.0.0-00.analog-stereo
Description: Qudelix-T71 2.0 Analog Stereo
Driver: PipeWire
Sample Specification: s32le 2ch 48000Hz
Channel Map: front-left,front-right
Owner Module: 4294967295
Mute: yes
Volume: front-left: 65536 / 100% / 0.00 dB, front-right: 65536 / 100% / 0.00 dB
balance 0.00
Base Volume: 65536 / 100% / 0.00 dB
Monitor Source: alsa_output.usb-Qudelix_Inc._Qudelix-T71_2.0_1.0.0-00.analog-stereo.monitor
Latency: 0 usec, configured 0 usec
Flags: HARDWARE HW_MUTE_CTRL HW_VOLUME_CTRL DECIBEL_VOLUME LATENCY
Properties:
alsa.card = "2"
alsa.card_name = "Qudelix-T71 2.0"
alsa.class = "generic"
alsa.components = "USB1fc9:7302"
alsa.device = "0"
alsa.driver_name = "snd_usb_audio"
alsa.id = "Q20"
alsa.long_card_name = "Qudelix,Inc. Qudelix-T71 2.0 at usb-0000:4d:00.0-3, high speed"
alsa.mixer_name = "USB Mixer"
alsa.name = "USB Audio"
alsa.resolution_bits = "32"
alsa.subclass = "generic-mix"
alsa.subdevice = "0"
alsa.subdevice_name = "subdevice #0"
api.alsa.card.longname = "Qudelix,Inc. Qudelix-T71 2.0 at usb-0000:4d:00.0-3, high speed"
api.alsa.card.name = "Qudelix-T71 2.0"
api.alsa.path = "front:2"
api.alsa.pcm.card = "2"
api.alsa.pcm.stream = "playback"
audio.channels = "2"
audio.position = "FL,FR"
card.profile.device = "1"
device.api = "alsa"
device.class = "sound"
device.id = "136"
device.profile.description = "Analog Stereo"
device.profile.name = "analog-stereo"
device.routes = "1"
factory.name = "api.alsa.pcm.sink"
media.class = "Audio/Sink"
device.description = "Qudelix-T71 2.0 "
node.name = "alsa_output.usb-Qudelix_Inc._Qudelix-T71_2.0_1.0.0-00.analog-stereo"
node.nick = "Qudelix-T71 2.0"
node.pause-on-idle = "false"
object.path = "alsa:pcm:2:front:2:playback"
priority.driver = "1009"
priority.session = "1009"
factory.id = "18"
clock.quantum-limit = "8192"
client.id = "40"
node.driver = "true"
factory.mode = "merge"
audio.adapt.follower = ""
library.name = "audioconvert/libspa-audioconvert"
object.id = "123"
object.serial = "229"
api.acp.auto-port = "false"
api.alsa.card = "2"
api.alsa.use-acp = "true"
api.dbus.ReserveDevice1 = "Audio2"
api.dbus.ReserveDevice1.Priority = "-20"
device.bus = "usb"
device.bus-id = "usb-Qudelix_Inc._Qudelix-T71_2.0_1.0.0-00"
device.bus_path = "pci-0000:4d:00.0-usb-0:3:1.0"
device.enum.api = "udev"
device.icon_name = "audio-card-analog-usb"
device.name = "alsa_card.usb-Qudelix_Inc._Qudelix-T71_2.0_1.0.0-00"
device.nick = "Qudelix-T71 2.0"
device.plugged.usec = "6980056"
device.product.id = "0x7302"
device.product.name = "Qudelix-T71 2.0 "
device.serial = "Qudelix_Inc._Qudelix-T71_2.0_1.0.0"
device.subsystem = "sound"
sysfs.path = "/devices/pci0000:00/0000:00:02.1/0000:45:00.0/0000:46:0c.0/0000:4d:00.0/usb3/3-3/3-3:1.0/sound/card2"
device.vendor.id = "0x1fc9"
device.vendor.name = "NXP Semiconductors"
device.string = "2"
Ports:
analog-output: Analog Output (type: Analog, priority: 9900, availability unknown)
Active Port: analog-output
Formats:
pcm
It looks like Linux doesn’t touch the main volume only the FR and FL and looking at a similar issue from android
It seems that for some reason Linux isn’t reporting the right value
Interesting fact PS5 Mode reports the correct value.