如何設置音效卡上的輸出埠？

我的音效卡有兩個埠；為清楚起見，我將它們稱為“揚聲器”和“耳機”埠。在 Windows 中，音頻控制看到兩個獨立的埠，我可以隨意在揚聲器和耳機之間來回切換。

在Linux中，預設情況下音頻總是從揚聲器埠出來，如果我插入耳機，則會自動切換到耳機埠。

如何控制這種行為？我嘗試使用 pacmd 的“sink-set-port”，“list-sinks”輸出表明“活動埠”已更改，但實際上沒有任何反應。

來自列表接收器的數據：

properties:
   alsa.resolution_bits = "16"
   device.api = "alsa"
   device.class = "sound"
   alsa.class = "generic"
   alsa.subclass = "generic-mix"
   alsa.name = "ALC889 Analog"
   alsa.id = "ALC889 Analog"
   alsa.subdevice = "0"
   alsa.subdevice_name = "subdevice #0"
   alsa.device = "0"
   alsa.card = "0"
   alsa.card_name = "HDA Intel PCH"
   alsa.long_card_name = "HDA Intel PCH at 0xfbff8000 irq 60"
   alsa.driver_name = "snd_hda_intel"
   device.bus_path = "pci-0000:00:1b.0"
   sysfs.path = "/devices/pci0000:00/0000:00:1b.0/sound/card0"
   device.bus = "pci"
   device.vendor.id = "8086"
   device.vendor.name = "Intel Corporation"
   device.product.id = "1c20"
   device.product.name = "6 Series/C200 Series Chipset Family High Definition Audio Controller"
   device.form_factor = "internal"
   device.string = "front:0"
   device.buffering.buffer_size = "65536"
   device.buffering.fragment_size = "32768"
   device.access_mode = "mmap+timer"
   device.profile.name = "analog-stereo"
   device.profile.description = "Analog Stereo"
   device.description = "Built-in Audio Analog Stereo"
   alsa.mixer_name = "Realtek ALC889"
   alsa.components = "HDA:10ec0889,1458a022,00100004"
   module-udev-detect.discovered = "1"
   device.icon_name = "audio-card-pci"
ports:
   analog-output: Analog Output (priority 9900, latency offset 0 usec, available: unknown)
       properties:
           
   analog-output-headphones: Headphones (priority 9000, latency offset 0 usec, available: yes)
       properties:
           device.icon_name = "audio-headphones"
active port: <analog-output>

結果發現，當耳機插孔插入某些東西時，ALSA 會自動使我的主揚聲器靜音。我可以通過禁用 alsamixer 中的自動靜音模式來禁用它。然後我可以獨立控制耳機埠和揚聲器埠的電平。

引用自：https://unix.stackexchange.com/questions/190635