我最近購買了一款帶有 7.1 虛擬環繞聲的有線 USB 耳機，根據製造商的說法，它也支援 GNU/Linux 和 Chrome 作業系統。根據我在評論中讀到的內容，Windows 用戶似乎對虛擬環繞聲功能感到滿意，我希望在 Ubuntu MATE 22.04.1 上也能擁有相同的功能。問題是它僅被識別為立體聲（Pavucontrol 僅顯示“USB PnP 音訊設備數位立體聲（IEC958）”的左前和右前通道，並且連接埠被列為“數位輸出（S/PDIF）”）並且我找不到在5.1 中使用AC-3 聲音播放我的檔案的方法，它們都被縮混為立體聲。在脈衝音訊音量控制的輸出裝置標籤中，我在該裝置的進階設定中勾選了 AC-3 複選框，但這沒有幫助。
在 lsusb 中，耳機顯示為
Bus 003 Device 015: ID 0c76:161f JMTek, LLC. USB PnP Audio Device
在 [Linux Hardware][1] 資料庫中，這似乎是一款相當常見的耳機。
alsamixer 指令，選擇適當的音效卡後，顯示以下內容： [alsamixer 截圖][2]
任何幫助將不勝感激，請給我我的 5.1 虛擬環繞聲。您可以在下面找到一些命令輸出，以提供更多資訊。
Here's the output of aplay -l
$ aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: HDMI [HDA ATI HDMI], device 3: HDMI 0 [HDMI 0]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: Generic [HD-Audio Generic], device 0: ALC3227 Analog [ALC3227 Analog]
Subdevices: 0/1
Subdevice #0: subdevice #0
card 2: Device [USB PnP Audio Device], device 0: USB Audio [USB Audio]
Subdevices: 0/1
Subdevice #0: subdevice #0
這是 aplay -L 的輸出
$ aplay -L
null
Discard all samples (playback) or generate zero samples (capture)
default
Playback/recording through the PulseAudio sound server
samplerate
Rate Converter Plugin Using Samplerate Library
speexrate
Rate Converter Plugin Using Speex Resampler
jack
JACK Audio Connection Kit
oss
Open Sound System
pulse
PulseAudio Sound Server
upmix
Plugin for channel upmix (4,6,8)
vdownmix
Plugin for channel downmix (stereo) with a simple spacialization
hw:CARD=HDMI,DEV=3
HDA ATI HDMI, HDMI 0
Direct hardware device without any conversions
plughw:CARD=HDMI,DEV=3
HDA ATI HDMI, HDMI 0
Hardware device with all software conversions
hdmi:CARD=HDMI,DEV=0
HDA ATI HDMI, HDMI 0
HDMI Audio Output
dmix:CARD=HDMI,DEV=3
HDA ATI HDMI, HDMI 0
Direct sample mixing device
usbstream:CARD=HDMI
HDA ATI HDMI
USB Stream Output
hw:CARD=Generic,DEV=0
HD-Audio Generic, ALC3227 Analog
Direct hardware device without any conversions
plughw:CARD=Generic,DEV=0
HD-Audio Generic, ALC3227 Analog
Hardware device with all software conversions
sysdefault:CARD=Generic
HD-Audio Generic, ALC3227 Analog
Default Audio Device
front:CARD=Generic,DEV=0
HD-Audio Generic, ALC3227 Analog
Front output / input
surround21:CARD=Generic,DEV=0
HD-Audio Generic, ALC3227 Analog
2.1 Surround output to Front and Subwoofer speakers
surround41:CARD=Generic,DEV=0
HD-Audio Generic, ALC3227 Analog
4.1 Surround output to Front, Rear and Subwoofer speakers
surround50:CARD=Generic,DEV=0
HD-Audio Generic, ALC3227 Analog
5.0 Surround output to Front, Center and Rear speakers
surround71:CARD=Generic,DEV=0
HD-Audio Generic, ALC3227 Analog
7.1 Surround output to Front, Center, Side, Rear and Woofer speakers
dmix:CARD=Generic,DEV=0
HD-Audio Generic, ALC3227 Analog
Direct sample mixing device
usbstream:CARD=Generic
HD-Audio Generic
USB Stream Output
surround51:CARD=Generic,DEV=0
HD-Audio Generic, ALC3227 Analog
Downmix to stereo 5.1 Surround output to Front, Center, Rear and Subwoofer speakers
surround40:CARD=Generic,DEV=0
HD-Audio Generic, ALC3227 Analog
Downmix to stereo 4.0 Surround output to Front, Center, Rear and Subwoofer speakers
hw:CARD=Device,DEV=0
USB PnP Audio Device, USB Audio
Direct hardware device without any conversions
plughw:CARD=Device,DEV=0
USB PnP Audio Device, USB Audio
Hardware device with all software conversions
sysdefault:CARD=Device
USB PnP Audio Device, USB Audio
Default Audio Device
front:CARD=Device,DEV=0
USB PnP Audio Device, USB Audio
Front output / input
surround21:CARD=Device,DEV=0
USB PnP Audio Device, USB Audio
2.1 Surround output to Front and Subwoofer speakers
surround41:CARD=Device,DEV=0
USB PnP Audio Device, USB Audio
4.1 Surround output to Front, Rear and Subwoofer speakers
surround50:CARD=Device,DEV=0
USB PnP Audio Device, USB Audio
5.0 Surround output to Front, Center and Rear speakers
surround71:CARD=Device,DEV=0
USB PnP Audio Device, USB Audio
7.1 Surround output to Front, Center, Side, Rear and Woofer speakers
iec958:CARD=Device,DEV=0
USB PnP Audio Device, USB Audio
IEC958 (S/PDIF) Digital Audio Output
dmix:CARD=Device,DEV=0
USB PnP Audio Device, USB Audio
Direct sample mixing device
usbstream:CARD=Device
USB PnP Audio Device
USB Stream Output
surround51:CARD=Device,DEV=0
USB PnP Audio Device, USB Audio
Downmix to stereo 5.1 Surround output to Front, Center, Rear and Subwoofer speakers
surround40:CARD=Device,DEV=0
USB PnP Audio Device, USB Audio
Downmix to stereo 4.0 Surround output to Front, Center, Rear and Subwoofer speakers```
[1]: http://linux-hardware.org/?id=usb:0c76-161f
[2]: https://i.stack.imgur.com/9lAwM.gif