我正在使用 ubuntu 12.04 桌面版。麦克风无法使用。我尝试在不同的地方使用同一个麦克风，麦克风可以使用。这是“pacmd list-sources”的输出，请帮助我。
root@vijay# pacmd 列表源
Welcome to PulseAudio! Use "help" for usage information.
3 source(s) available.
index: 0
name: <alsa_output.pci-0000_01_00.1.hdmi-stereo.monitor>
driver: <module-alsa-card.c>
flags: DECIBEL_VOLUME LATENCY DYNAMIC_LATENCY
state: SUSPENDED
suspend cause: IDLE
priority: 1050
volume: 0: 100% 1: 100%
0: 0.00 dB 1: 0.00 dB
balance 0.00
base volume: 100%
0.00 dB
volume steps: 65537
muted: no
current latency: 0.00 ms
max rewind: 0 KiB
sample spec: s16le 2ch 44100Hz
channel map: front-left,front-right
Stereo
used by: 0
linked by: 0
configured latency: 0.00 ms; range is 0.50 .. 371.52 ms
monitor_of: 0
card: 0 <alsa_card.pci-0000_01_00.1>
module: 4
properties:
device.description = "Monitor of High Definition Audio Controller Digital Stereo (HDMI)"
device.class = "monitor"
alsa.card = "1"
alsa.card_name = "HDA NVidia"
alsa.long_card_name = "HDA NVidia at 0xd6000000 irq 3"
alsa.driver_name = "snd_hda_intel"
device.bus_path = "pci-0000:01:00.1"
sysfs.path = "/devices/pci0000:00/0000:00:01.0/0000:01:00.1/sound/card1"
device.bus = "pci"
device.vendor.id = "10de"
device.vendor.name = "NVIDIA Corporation"
device.product.name = "High Definition Audio Controller"
device.string = "1"
module-udev-detect.discovered = "1"
device.icon_name = "audio-card-pci"
index: 1
name: <alsa_output.pci-0000_00_1e.2.analog-stereo.monitor>
driver: <module-alsa-card.c>
flags: DECIBEL_VOLUME LATENCY DYNAMIC_LATENCY
state: IDLE
suspend cause:
priority: 1950
volume: 0: 100% 1: 100%
0: 0.00 dB 1: 0.00 dB
balance 0.00
base volume: 100%
0.00 dB
volume steps: 65537
muted: no
current latency: 0.00 ms
max rewind: 64 KiB
sample spec: s16le 2ch 44100Hz
channel map: front-left,front-right
Stereo
used by: 0
linked by: 0
configured latency: 371.52 ms; range is 1.00 .. 371.52 ms
monitor_of: 1
card: 1 <alsa_card.pci-0000_00_1e.2>
module: 5
properties:
device.description = "Monitor of Built-in Audio Analog Stereo"
device.class = "monitor"
alsa.card = "0"
alsa.card_name = "Intel ICH7"
alsa.long_card_name = "Intel ICH7 with AD1888 at irq 22"
alsa.driver_name = "snd_intel8x0"
device.bus_path = "pci-0000:00:1e.2"
sysfs.path = "/devices/pci0000:00/0000:00:1e.2/sound/card0"
device.bus = "pci"
device.vendor.id = "8086"
device.vendor.name = "Intel Corporation"
device.product.name = "82801G (ICH7 Family) AC'97 Audio Controller"
device.form_factor = "internal"
device.string = "0"
module-udev-detect.discovered = "1"
device.icon_name = "audio-card-pci"
index: 2
name: <alsa_input.pci-0000_00_1e.2.analog-stereo>
driver: <module-alsa-card.c>
flags: HARDWARE HW_MUTE_CTRL HW_VOLUME_CTRL DECIBEL_VOLUME LATENCY DYNAMIC_LATENCY
state: SUSPENDED
suspend cause: IDLE
priority: 9959
volume: 0: 94% 1: 94%
0: -1.50 dB 1: -1.50 dB
balance 0.00
base volume: 42%
-22.50 dB
volume steps: 65537
muted: no
current latency: 0.00 ms
max rewind: 0 KiB
sample spec: s16le 2ch 44100Hz
channel map: front-left,front-right
Stereo
used by: 0
linked by: 0
configured latency: 0.00 ms; range is 0.50 .. 371.52 ms
card: 1 <alsa_card.pci-0000_00_1e.2>
module: 5
properties:
alsa.resolution_bits = "16"
device.api = "alsa"
device.class = "sound"
alsa.class = "generic"
alsa.subclass = "generic-mix"
alsa.name = "Intel ICH7"
alsa.id = "Intel ICH"
alsa.subdevice = "0"
alsa.subdevice_name = "subdevice #0"
alsa.device = "0"
alsa.card = "0"
alsa.card_name = "Intel ICH7"
alsa.long_card_name = "Intel ICH7 with AD1888 at irq 22"
alsa.driver_name = "snd_intel8x0"
device.bus_path = "pci-0000:00:1e.2"
sysfs.path = "/devices/pci0000:00/0000:00:1e.2/sound/card0"
device.bus = "pci"
device.vendor.id = "8086"
device.vendor.name = "Intel Corporation"
device.product.name = "82801G (ICH7 Family) AC'97 Audio Controller"
device.form_factor = "internal"
device.string = "front:0"
device.buffering.buffer_size = "65536"
device.buffering.fragment_size = "65536"
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 = "Analog Devices AD1888"
alsa.components = "AC97a:41445368"
module-udev-detect.discovered = "1"
device.icon_name = "audio-card-pci"
ports:
analog-input-microphone;input-microphone-1: Microphone / Microphone 1 (priority 8720, available: unknown)
properties:
analog-input-microphone;input-microphone-2: Microphone / Microphone 2 (priority 8719, available: unknown)
properties:
analog-input-linein: Line In (priority 8100, available: unknown)
properties:
analog-input: Analog Input (priority 8000, available: unknown)
properties:
analog-input-video: Video (priority 7000, available: unknown)
properties:
active port: <analog-input-linein>
lspci
00:00.0 Host bridge: Intel Corporation 82945G/GZ/P/PL Memory Controller Hub (rev 02)
00:01.0 PCI bridge: Intel Corporation 82945G/GZ/P/PL PCI Express Root Port (rev 02)
00:1c.0 PCI bridge: Intel Corporation N10/ICH 7 Family PCI Express Port 1 (rev 01)
00:1c.1 PCI bridge: Intel Corporation N10/ICH 7 Family PCI Express Port 2 (rev 01)
00:1d.0 USB controller: Intel Corporation N10/ICH 7 Family USB UHCI Controller#1 (rev 01)
00:1d.1 USB controller: Intel Corporation N10/ICH 7 Family USB UHCI Controller#2 (rev 01)
00:1d.2 USB controller: Intel Corporation N10/ICH 7 Family USB UHCI Controller#3 (rev 01)
00:1d.7 USB controller: Intel Corporation N10/ICH 7 Family USB2 EHCI Controller(rev 01)
00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev e1)
00:1e.2 Multimedia audio controller: Intel Corporation 82801G (ICH7 Family) AC'97 Audio Controller (rev 01)
00:1f.0 ISA bridge: Intel Corporation 82801GB/GR (ICH7 Family) LPC Interface Bridge (rev 01)
00:1f.1 IDE interface: Intel Corporation 82801G (ICH7 Family) IDE Controller (rev 01)
00:1f.2 IDE interface: Intel Corporation N10/ICH7 Family SATA Controller [IDE mode] (rev 01)
00:1f.3 SMBus: Intel Corporation N10/ICH 7 Family SMBus Controller (rev 01)
01:00.0 VGA compatible controller: NVIDIA Corporation GT218 [GeForce 8400 GS] (rev a2)
01:00.1 Audio device: NVIDIA Corporation High Definition Audio Controller (rev a1)
04:00.0 Ethernet controller: Broadcom Corporation NetLink BCM5789 Gigabit Ethernet PCI Express (rev 21)
请帮我。
答案1
您的音频卡的源端口设置为<analog-input-linein>Line-In 端口，而不是麦克风端口。
要更改音频卡的输入端口，我们可以发出以下命令：
pacmd set-source-port <sink-index> <port-name>
在你的情况下，这将是
pacmd set-source-port 2 'analog-input-microphone;input-microphone-1'
然后，我们还必须确保该接收器是我们的默认输入接收器：
pacmd set-default-source 2
根据您的硬件，我可能必须先插入麦克风才能使用此端口。
笔记在每个用户设置中运行 pulseaudio 时（这是我们推荐的和默认的方式），我们不需要以 root 身份发出上述命令。