欢迎来到永无止境的故事的另一集：音频故障排除......
我有一款 USB3 耳机（Jabra Connect 4h）。扬声器工作正常，但麦克风无法使用：
- alsa 似乎看到了它：
➜arecord -l
**** List of CAPTURE Hardware Devices ****
card 0: PCH [HDA Intel PCH], device 0: ALC256 Analog [ALC256 Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: Audio [Thunderbolt 4 Dock Audio], device 0: USB Audio [USB Audio]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 2: Camera [Auto Focus Camera], device 0: USB Audio [USB Audio]
Subdevices: 0/1
Subdevice #0: subdevice #0
card 3: J4h [Jabra Connect 4h], device 0: USB Audio [USB Audio]
Subdevices: 1/1
Subdevice #0: subdevice #0
但 PulseAudio 没有在pavucontrol-qt输入设备选项卡中列出它。
Piprewire 不再幸运：
➜wpctl status
Audio
├─ Devices:
│ 48. Built-in Audio [alsa]
│ 59. Thunderbolt 4 Dock Audio [alsa]
│ 80. Auto Focus Camera [alsa]
│ 103. Jabra Connect 4h [alsa]
│
├─ Sinks:
│ 53. Built-in Audio Analog Stereo [vol: 1.00]
│ 61. Thunderbolt 4 Dock Audio Analog Stereo [vol: 0.40]
│ * 79. Jabra Connect 4h Digital Stereo (IEC958) [vol: 0.65]
│
├─ Sink endpoints:
│
├─ Sources:
│ 54. Built-in Audio Analog Stereo [vol: 1.00]
│ 58. Thunderbolt 4 Dock Audio Analog Stereo [vol: 0.97]
│ * 75. Auto Focus Camera Analog Stereo [vol: 1.00]
│
├─ Source endpoints:
那么... 排除故障并解决这个问题的方法是什么？