Kubuntu17.10下带裂纹声/噪声的PulseAudio回送模块

Question

我试图从我的第二个显示器通过线内立体声插孔获得声音进入库本图，现在它基本上是在与alsamixer (非静音线和音量设置正确)并将load-module module-loopback添加到我的/etc/pulse/default.pa之后工作。

我目前和这个设置最大的问题是，我在播放音频时听到的声音/噪音--即使在调整线路后--音量到了5%(以上的一切都是痛苦的)，并且在我的外部放大器上增加了音量。(在Windows 10下，即使行卷为100%，我也不会对此设置产生裂纹/声音问题)

到目前为止我尝试过的What：

( 1)在/etc/pulse/default.pa中有load-module module-udev-detect tsched=0 (添加tsched=0)，用于在PulseAudio中禁用基于计时器的调度，从而帮助其他人发出刺耳的声音。

( 2)将1)与/etc/pulse/daemon.conf中的修改相结合，以设置PulseAudio中的默认片段号和缓冲区大小(如此处：https://wiki.archlinux.org/index.php/PulseAudio/Troubleshooting#Static_噪声_什么时候_使用_耳机)

3)(显式地编写环回源和接收器及其速率和通道：

load-module module-loopback source=alsa_input.pci-0000_12_00.3.analog-stereo sink=alsa_output.usb-FiiO_DigiHug_USB_Audio-01.analog-stereo rate=44100 channels=2

和4)使用options snd-hda-intel position_fix=1或options snd-hda-intel position_fix=2修改D10或D11，如下所示：https://wiki.ubuntu.com/Audio/PositionReporting

My系统：

• Kubuntu 17.10，64位
• 内核-版本4.13.0-36-泛型
• AMD Ryzen 7 1700X CPU
• 16 GB RAM
• ASRock X370太极主板
• Nvidia GTX 1070 GPU

lspci -nnk | grep -i audio -A2
0e:00.1 Audio device [0403]: NVIDIA Corporation GP104 High Definition Audio Controller [10de:10f0] (rev a1)
        Subsystem: CardExpert Technology GP104 High Definition Audio Controller [10b0:1b81]
        Kernel driver in use: snd_hda_intel
        Kernel modules: snd_hda_intel
--
12:00.3 Audio device [0403]: Advanced Micro Devices, Inc. [AMD] Device [1022:1457]
        Subsystem: ASRock Incorporation Device [1849:1220]
        Kernel driver in use: snd_hda_intel

cat /proc/asound/cards
 0 [NVidia         ]: HDA-Intel - HDA NVidia
                      HDA NVidia at 0xfd080000 irq 329                                                                                                                                  
 1 [Audio          ]: USB-Audio - DigiHug USB Audio                                                                                                                                     
                      FiiO DigiHug USB Audio at usb-0000:11:00.3-2, full speed
 2 [Generic        ]: HDA-Intel - HD-Audio Generic
                      HD-Audio Generic at 0xfd900000 irq 331

pactl list sources
Quelle #0
        Status: RUNNING
        Name: alsa_output.usb-FiiO_DigiHug_USB_Audio-01.analog-stereo.monitor
        Beschreibung: Monitor of DigiHug USB Audio Analog Stereo
        Treiber: module-alsa-card.c
        Abtastwert-Angabe: s16le 2ch 44100Hz
        Kanalzuordnung: front-left,front-right
        Besitzer-Modul: 7
        Stumm: ja
        Lautstärke: front-left: 65536 / 100% / 0,00 dB,   front-right: 65536 / 100% / 0,00 dB
                Verteilung 0,00
        Basis-Lautstärke: 65536 / 100% / 0,00 dB
        Ziel-Monitor: alsa_output.usb-FiiO_DigiHug_USB_Audio-01.analog-stereo
        Latenz: 0 usec, eingestellt 40000 usec
        Flags: DECIBEL_VOLUME LATENCY 
        Eigenschaften:
                device.description = "Monitor of DigiHug USB Audio Analog Stereo"
                device.class = "monitor"
                alsa.card = "1"
                alsa.card_name = "DigiHug USB Audio"
                alsa.long_card_name = "FiiO DigiHug USB Audio at usb-0000:11:00.3-2, full speed"
                alsa.driver_name = "snd_usb_audio"
                device.bus_path = "pci-0000:11:00.3-usb-0:2:1.1"
                sysfs.path = "/devices/pci0000:00/0000:00:07.1/0000:11:00.3/usb3/3-2/3-2:1.1/sound/card1"
                udev.id = "usb-FiiO_DigiHug_USB_Audio-01"
                device.bus = "usb"
                device.vendor.id = "1852"
                device.vendor.name = "GYROCOM C&C Co., LTD"
                device.product.id = "7022"
                device.product.name = "DigiHug USB Audio"
                device.serial = "FiiO_DigiHug_USB_Audio"
                device.string = "1"
                module-udev-detect.discovered = "1"
                device.icon_name = "audio-card-usb"
        Formate:
                pcm

Quelle #1
        Status: RUNNING
        Name: alsa_input.pci-0000_12_00.3.analog-stereo
        Beschreibung: HD-Audio Generic Analog Stereo
        Treiber: module-alsa-card.c
        Abtastwert-Angabe: s16le 2ch 44100Hz
        Kanalzuordnung: front-left,front-right
        Besitzer-Modul: 8
        Stumm: nein
        Lautstärke: front-left: 6554 /  10% / -60,00 dB,   front-right: 6554 /  10% / -60,00 dB
                Verteilung 0,00
        Basis-Lautstärke: 6554 /  10% / -60,00 dB
        Ziel-Monitor: k. A.
        Latenz: 30 usec, eingestellt 40000 usec
        Flags: HARDWARE HW_MUTE_CTRL HW_VOLUME_CTRL DECIBEL_VOLUME LATENCY 
        Eigenschaften:
                alsa.resolution_bits = "16"
                device.api = "alsa"
                device.class = "sound"
                alsa.class = "generic"
                alsa.subclass = "generic-mix"
                alsa.name = "ALC1220 Analog"
                alsa.id = "ALC1220 Analog"
                alsa.subdevice = "0"
                alsa.subdevice_name = "subdevice #0"
                alsa.device = "0"
                alsa.card = "2"
                alsa.card_name = "HD-Audio Generic"
                alsa.long_card_name = "HD-Audio Generic at 0xfd900000 irq 331"
                alsa.driver_name = "snd_hda_intel"
                device.bus_path = "pci-0000:12:00.3"
                sysfs.path = "/devices/pci0000:00/0000:00:08.1/0000:12:00.3/sound/card2"
                device.bus = "pci"
                device.vendor.id = "1022"
                device.vendor.name = "Advanced Micro Devices, Inc. [AMD]"
                device.product.id = "1457"
                device.string = "front:2"
                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 = "HD-Audio Generic Analog Stereo"
                alsa.mixer_name = "Realtek ALC1220"
                alsa.components = "HDA:10ec1220,18491220,00100003"
                module-udev-detect.discovered = "1"
                device.icon_name = "audio-card-pci"
        Ports:
                analog-input-front-mic: Vorderes Mikrofon (priority: 8500, not available)
                analog-input-rear-mic: Rückwärtiges Mikrofon (priority: 8200, not available)
                analog-input-linein: Eingang (priority: 8100, available)
        Aktiver Port: analog-input-linein
        Formate:
                pcm

pactl list sinks
Ziel #0
        Status: RUNNING
        Name: alsa_output.usb-FiiO_DigiHug_USB_Audio-01.analog-stereo
        Beschreibung: DigiHug USB Audio Analog Stereo
        Treiber: module-alsa-card.c
        Abtastwert-Angabe: s16le 2ch 44100Hz
        Kanalzuordnung: front-left,front-right
        Besitzer-Modul: 7
        Stumm: nein
        Lautstärke: front-left: 65536 / 100% / 0,00 dB,   front-right: 65536 / 100% / 0,00 dB
                Verteilung 0,00
        Basis-Lautstärke: 65536 / 100% / 0,00 dB
        Quellen-Monitor: alsa_output.usb-FiiO_DigiHug_USB_Audio-01.analog-stereo.monitor
        Latenz: 46296 usec, eingestellt 40000 usec
        Flags: HARDWARE HW_MUTE_CTRL HW_VOLUME_CTRL DECIBEL_VOLUME LATENCY 
        Eigenschaften:
                alsa.resolution_bits = "16"
                device.api = "alsa"
                device.class = "sound"
                alsa.class = "generic"
                alsa.subclass = "generic-mix"
                alsa.name = "USB Audio"
                alsa.id = "USB Audio"
                alsa.subdevice = "0"
                alsa.subdevice_name = "subdevice #0"
                alsa.device = "0"
                alsa.card = "1"
                alsa.card_name = "DigiHug USB Audio"
                alsa.long_card_name = "FiiO DigiHug USB Audio at usb-0000:11:00.3-2, full speed"
                alsa.driver_name = "snd_usb_audio"
                device.bus_path = "pci-0000:11:00.3-usb-0:2:1.1"
                sysfs.path = "/devices/pci0000:00/0000:00:07.1/0000:11:00.3/usb3/3-2/3-2:1.1/sound/card1"
                udev.id = "usb-FiiO_DigiHug_USB_Audio-01"
                device.bus = "usb"
                device.vendor.id = "1852"
                device.vendor.name = "GYROCOM C&C Co., LTD"
                device.product.id = "7022"
                device.product.name = "DigiHug USB Audio"
                device.serial = "FiiO_DigiHug_USB_Audio"
                device.string = "front:1"
                device.buffering.buffer_size = "352800"
                device.buffering.fragment_size = "176400"
                device.access_mode = "mmap+timer"
                device.profile.name = "analog-stereo"
                device.profile.description = "Analog Stereo"
                device.description = "DigiHug USB Audio Analog Stereo"
                alsa.mixer_name = "USB Mixer"
                alsa.components = "USB1852:7022"
                module-udev-detect.discovered = "1"
                device.icon_name = "audio-card-usb"
        Ports:
                analog-output: Analoge Ausgabe (priority: 9900)
        Aktiver Port: analog-output
        Formate:
                pcm

My基本音频设置：

投入：

• 从第二个监视器进入计算机线路的音频
• 所有其他音频都来自系统/应用程序/音乐。

输出：

• 我的耳机连接的USB-DAC/AMP

Answer 1

关键的项目，这得到了修复，为我以下。

案例修改

1. 移除GPU风扇外壳，在我的GPU上有一个保护塑料外壳，在里面听的时候，里面发出了一些噪音。
2. 重新定位内存，我的内存就在一个NVMe卡旁边，所以我把它移到下一个插槽上。
3. 在NVMe的GPU附近拆下防护罩，在主板上有一个NVMe棒顶部的保护盾。

功率修改

1. 将两台机器的电源移到不同的插座上。这实际上帮助减少了很多反馈噪音，因为我学会了接地。

PulseAudio改性

load-module module-loopback source=alsa_input.usb-Corsair_CORSAIR_VOID_ELITE_Wireless_Gaming_Dongle-00.multichannel-input sink=alsa_output.pci-0000_09_00.3.analog-stereo
load-module module-loopback source=alsa_input.pci-0000_09_00.3.analog-stereo sink=alsa_output.usb-Corsair_CORSAIR_VOID_ELITE_Wireless_Gaming_Dongle-00.iec958-stereo


set-default-sink alsa_output.usb-Corsair_CORSAIR_VOID_ELITE_Wireless_Gaming_Dongle-00.iec958-stereo
set-default-source alsa_input.usb-Corsair_CORSAIR_VOID_ELITE_Wireless_Gaming_Dongle-00.multichannel-input
set-source-volume alsa_input.pci-0000_09_00.3.analog-stereo 5000

set-card-profile alsa_card.usb-HD_Webcam_USB_HD_Webcam_USB_HD_Webcam_USB-02 off
set-card-profile alsa_card.pci-0000_07_00.1 off
set-card-profile alsa_card.pci-0000_09_00.3 output:analog-stereo+input:analog-stereo

set-sink-port alsa_output.pci-0000_09_00.3.analog-stereo analog-output-lineout
set-source-port alsa_input.pci-0000_09_00.3.analog-stereo analog-input-linein

所有这些都被说，我仍然有一些反馈噪音，但只有在高GPU帧。我确实认为这是一个权力问题，并有另一部分命令，以帮助减少这种反馈。基本上是一个地面回路辅助装置。

这里也提到了我在这个问题上的斗争。https://bbs.archlinux.org/viewtopic.php?pid=1917945#p1917945

实际上，Edit 1实际上与软件无关，而且是硬件问题。我买了两台，并把它们插在两台机器之间，它已经完全解决了这个问题。即使在高容量的情况下也没有更多的反馈。https://www.amazon.com/gp/product/B019393MV2/ref=ppx_yo_dt_B_阿辛_标题_o03_s00?ie=UTF8&psc=1