设置：
- 创意声霸X4
- 2 个扬声器 + 1 个带 LFE 连接的低音炮
- Yeti USB 麦克风
- 软呢帽 39
目标：
- 让 X4 上的 LFE 输出通道正常工作，这样我就可以在不插入桌面扬声器的情况下进行子工作
- 在插入 X4 的耳机上混合麦克风音频，就像我的耳机插入麦克风一样。
X4 支持确实有 LFE 输出，我从未在 Linux 上输出过，但我已将其插入 Mac 和 Windows 计算机上并确认它确实有效。
到目前为止，我所设法做的权宜之计是获得一些 LFE 通道输出。由于我的桌面扬声器确实有一个低音炮输出，所以我（我认为）有一个虚拟接收器，它可以组合这些音频通道并将 LFE 向上混音。
我也没有设法让麦克风监控正常工作，不过，如果能再次正常工作那就太好了。 X4 有一个功能可以在音频播放和监听音频电平之间实现平衡，我想尝试一下，但如果这不起作用，我也不会失眠。
这就是我的配置。
/etc/pipewire/pipewire.conf.d/sink-virtual-surround-2.1.conf
context.modules = [
{ name = libpipewire-module-loopback
args = {
node.description = "On-Board Virtual 2.1"
capture.props = {
node.name = "on-board_virtual_21"
media.class = "Audio/Sink"
audio.position = [ FL FR LFE ]
}
playback.props = {
node.name = "playback.on-board_virtual_21"
audio.position = [ AUX0 AUX1 AUX2 ]
target.object = "alsa_output.usb-Generic_USB_Audio-00.pro-output"
stream.dont-remix = true
node.passive = true
}
}
}
]
/etc/pipewire/pipewire-pulse.conf
stream.properties = {
#node.latency = 1024/48000
#node.autoconnect = true
resample.quality = 10
#channelmix.normalize = true
channelmix.mix-lfe = true
channelmix.upmix = true
#channelmix.upmix-method = psd # none, simple
channelmix.lfe-cutoff = 125
#channelmix.fc-cutoff = 12000
#channelmix.rear-delay = 12.0
#channelmix.stereo-widen = 0.0
#channelmix.hilbert-taps = 0
#dither.noise = 0
}
我想我应该尝试一下 UI 选项，结果发现赫尔武姆如果我能弄清楚的话，看起来它可以让我拖放它。如果我真正了解配置可能会更好。这就是 Helvum 目前的样子。虽然我不确定哪个 AUX 端口是 LFE 通道，但从端口布局来看，如果是 AUX3 就有意义了。
可能还有一些额外的上下文会有所帮助，但我不确定什么最有帮助。
音频设备的lsusb
/: Bus 003.Port 001: Dev 001, Class=root_hub, Driver=xhci_hcd/6p, 480M
ID 1d6b:0002 Linux Foundation 2.0 root hub
|__ Port 001: Dev 002, If 0, Class=Audio, Driver=snd-usb-audio, 12M
ID b58e:9e84 Blue Microphones Yeti Stereo Microphone
|__ Port 001: Dev 002, If 1, Class=Audio, Driver=snd-usb-audio, 12M
ID b58e:9e84 Blue Microphones Yeti Stereo Microphone
|__ Port 001: Dev 002, If 2, Class=Audio, Driver=snd-usb-audio, 12M
ID b58e:9e84 Blue Microphones Yeti Stereo Microphone
|__ Port 001: Dev 002, If 3, Class=Human Interface Device, Driver=usbhid, 12M
ID b58e:9e84 Blue Microphones Yeti Stereo Microphone
|__ Port 002: Dev 003, If 0, Class=Human Interface Device, Driver=usbhid, 480M
ID 041e:3278 Creative Technology, Ltd
|__ Port 002: Dev 003, If 1, Class=Communications, Driver=cdc_acm, 480M
ID 041e:3278 Creative Technology, Ltd
|__ Port 002: Dev 003, If 2, Class=CDC Data, Driver=cdc_acm, 480M
ID 041e:3278 Creative Technology, Ltd
|__ Port 002: Dev 003, If 3, Class=Audio, Driver=snd-usb-audio, 480M
ID 041e:3278 Creative Technology, Ltd
|__ Port 002: Dev 003, If 4, Class=Audio, Driver=snd-usb-audio, 480M
ID 041e:3278 Creative Technology, Ltd
|__ Port 002: Dev 003, If 5, Class=Audio, Driver=snd-usb-audio, 480M
ID 041e:3278 Creative Technology, Ltd
|__ Port 002: Dev 003, If 6, Class=Audio, Driver=snd-usb-audio, 480M
ID 041e:3278 Creative Technology, Ltd
协议信息
Server String: /run/user/1000/pulse/native
Library Protocol Version: 35
Server Protocol Version: 35
Is Local: yes
Client Index: 283
Tile Size: 65472
User Name: fr0bar
Host Name: icarus
Server Name: PulseAudio (on PipeWire 1.0.3)
Server Version: 15.0.0
Default Sample Specification: float32le 3ch 192000Hz
Default Channel Map: front-left,front-right,lfe
Default Sink: on-board_virtual_21
Default Source: alsa_input.usb-Blue_Microphones_Yeti_Stereo_Microphone_797_2018_09_25_85357-00.analog-stereo
Cookie: eecc:e044
aplay-l
**** List of PLAYBACK Hardware Devices ****
card 0: Microphone [Yeti Stereo Microphone], device 0: USB Audio [USB Audio]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: HDMI [HDA ATI HDMI], device 3: HDMI 0 [HDMI 0]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: HDMI [HDA ATI HDMI], device 7: HDMI 1 [HDMI 1]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: HDMI [HDA ATI HDMI], device 8: HDMI 2 [HDMI 2]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: HDMI [HDA ATI HDMI], device 9: HDMI 3 [HDMI 3]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 2: X4 [Sound Blaster X4], device 0: USB Audio [USB Audio]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 2: X4 [Sound Blaster X4], device 1: USB Audio [USB Audio #1]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 2: X4 [Sound Blaster X4], device 2: USB Audio [USB Audio #2]
Subdevices: 1/1
Subdevice #0: subdevice #0
arecord -l
**** List of CAPTURE Hardware Devices ****
card 0: Microphone [Yeti Stereo Microphone], device 0: USB Audio [USB Audio]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 2: X4 [Sound Blaster X4], device 0: USB Audio [USB Audio]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 3: C920 [HD Pro Webcam C920], device 0: USB Audio [USB Audio]
Subdevices: 1/1
Subdevice #0: subdevice #0
密码元数据
update: id:0 key:'default.configured.audio.sink' value:'{"name":"on-board_virtual_21"}' type:'Spa:String:JSON'
update: id:0 key:'default.configured.audio.source' value:'{"name":"alsa_input.usb-Blue_Microphones_Yeti_Stereo_Microphone_797_2018_09_25_85357-00.analog-stereo"}' type:'Spa:String:JSON'
update: id:0 key:'default.audio.sink' value:'{"name":"on-board_virtual_21"}' type:'Spa:String:JSON'
update: id:0 key:'default.audio.source' value:'{"name":"alsa_input.usb-Blue_Microphones_Yeti_Stereo_Microphone_797_2018_09_25_85357-00.analog-stereo"}' type:'Spa:String:JSON'
update: id:0 key:'default.video.source' value:'{"name":"v4l2_input.pci-0000_0e_00.3-usb-0_4_1.0"}' type:'Spa:String:JSON'
update: id:153 key:'target.node' value:'108' type:'Spa:Id'
update: id:153 key:'target.object' value:'109' type:'Spa:Id'
