Quero gravar áudio de vários dispositivos de entrada usando ALSA e Pulseaudio. Mais precisamente, quero jogar UltraStar Deluxe. É um jogo usando SDL. Pelo que sei, ele suporta apenas ALSA. Tudo está funcionando bem, desde que eu simplesmente use o dispositivo de "pulso" virtual ALSA para saída e entrada. Infelizmente, isso permite apenas um dispositivo de entrada, mas quero gravar a partir de três microfones independentes (USB). Misturar as três fontes em uma não é uma opção.
https://wiki.archlinux.de/title/Pulseaudio#Mehrere_PulseAudio_ALSA_Ger.C3.A4tesugere definir um ALSA PCM adicional adicionando
pcm.<pcmname> {
type pulse
device <devicename>
}
para o meu ~/.asoundrc. Infelizmente, não consigo descobrir o que usar para o nome do dispositivo pulseaudio. Eu tentei com o que acho que é o nome pulseaudio alsa_card.usb-0d8c_C-Media_USB_Audio_Device-00-Device. arecord -Lmostra o ALSA PCM virtual adicional, mas não consegue gravar a partir dele, fornecendo a mensagem de erro ALSA lib pcm_pulse.c:752:(pulse_prepare) PulseAudio: Unable to create stream: Entität nicht vorhanden(o último bit alemão se traduz em algo junto Entity not existant). O ALSA PCM virtual não aparece no UltraStar Deluxe.
Como posso conseguir isso? É possível de alguma forma? Eu uso o Pulseaudio para todo o resto e funciona bem. Sem o Pulseaudio, trabalhar com muitos programas é complicado e o áudio fica instável.
Aqui está a saída de pacmd list-cards:
4 card(s) available.
index: 0
... (HDMI Output Device stripped)
index: 1
name: <alsa_card.pci-0000_00_1b.0>
driver: <module-alsa-card.c>
owner module: 6
properties:
alsa.card = "0"
alsa.card_name = "HDA Intel PCH"
alsa.long_card_name = "HDA Intel PCH at 0xf6130000 irq 48"
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 = "1e20"
device.product.name = "7 Series/C210 Series Chipset Family High Definition Audio Controller"
device.form_factor = "internal"
device.string = "0"
device.description = "Internes Audio"
module-udev-detect.discovered = "1"
device.icon_name = "audio-card-pci"
profiles:
input:analog-stereo: Analog Stereo Eingang (priority 60, available: unknown)
output:analog-stereo: Analog Stereo Ausgang (priority 6000, available: unknown)
output:analog-stereo+input:analog-stereo: Analog Stereo Duplex (priority 6060, available: unknown)
output:analog-surround-40: Analog Surround 4.0 Ausgang (priority 700, available: unknown)
output:analog-surround-40+input:analog-stereo: Analog Surround 4.0 Ausgang + Analog Stereo Eingang (priority 760, available: unknown)
output:analog-surround-41: Analog Surround 4.1 Ausgang (priority 800, available: unknown)
output:analog-surround-41+input:analog-stereo: Analog Surround 4.1 Ausgang + Analog Stereo Eingang (priority 860, available: unknown)
output:analog-surround-50: Analog Surround 5.0 Ausgang (priority 700, available: unknown)
output:analog-surround-50+input:analog-stereo: Analog Surround 5.0 Ausgang + Analog Stereo Eingang (priority 760, available: unknown)
output:analog-surround-51: Analog Surround 5.1 Ausgang (priority 800, available: unknown)
output:analog-surround-51+input:analog-stereo: Analog Surround 5.1 Ausgang + Analog Stereo Eingang (priority 860, available: unknown)
output:iec958-stereo: Digital Stereo (IEC958) Ausgang (priority 5500, available: unknown)
output:iec958-stereo+input:analog-stereo: Digital Stereo (IEC958) Ausgang + Analog Stereo Eingang (priority 5560, available: unknown)
off: Aus (priority 0, available: unknown)
active profile: <output:analog-stereo>
sinks:
alsa_output.pci-0000_00_1b.0.analog-stereo/#0: Internes Audio Analog Stereo
sources:
alsa_output.pci-0000_00_1b.0.analog-stereo.monitor/#0: Monitor of Internes Audio Analog Stereo
ports:
analog-input: Analoge Eingabe (priority 10000, latency offset 0 usec, available: unknown)
properties:
analog-input-microphone: Mikrofon (priority 8700, latency offset 0 usec, available: no)
properties:
device.icon_name = "audio-input-microphone"
analog-input-linein: Line In (priority 8100, latency offset 0 usec, available: no)
properties:
analog-output: Analoge Ausgabe (priority 9900, latency offset 0 usec, available: unknown)
properties:
iec958-stereo-output: Digitaler Ausgang (S/PDIF) (priority 0, latency offset 0 usec, available: unknown)
properties:
index: 2
name: <alsa_card.usb-0d8c_C-Media_USB_Audio_Device-00-Device>
driver: <module-alsa-card.c>
owner module: 7
properties:
alsa.card = "1"
alsa.card_name = "C-Media USB Audio Device"
alsa.long_card_name = "C-Media USB Audio Device at usb-0000:00:1d.0-1.5, full speed"
alsa.driver_name = "snd_usb_audio"
device.bus_path = "pci-0000:00:1d.0-usb-0:1.5:1.0"
sysfs.path = "/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.5/2-1.5:1.0/sound/card1"
udev.id = "usb-0d8c_C-Media_USB_Audio_Device-00-Device"
device.bus = "usb"
device.vendor.id = "0d8c"
device.vendor.name = "C-Media Electronics, Inc."
device.product.id = "0008"
device.product.name = "C-Media USB Audio Device "
device.serial = "0d8c_C-Media_USB_Audio_Device"
device.string = "1"
device.description = "C-Media USB Audio Device "
module-udev-detect.discovered = "1"
device.icon_name = "audio-card-usb"
profiles:
input:analog-mono: Analog Mono Eingang (priority 1, available: unknown)
output:analog-stereo: Analog Stereo Ausgang (priority 6000, available: unknown)
output:analog-stereo+input:analog-mono: Analog Stereo Ausgang + Analog Mono Eingang (priority 6001, available: unknown)
output:iec958-stereo: Digital Stereo (IEC958) Ausgang (priority 5500, available: unknown)
output:iec958-stereo+input:analog-mono: Digital Stereo (IEC958) Ausgang + Analog Mono Eingang (priority 5501, available: unknown)
off: Aus (priority 0, available: unknown)
active profile: <input:analog-mono>
sources:
alsa_input.usb-0d8c_C-Media_USB_Audio_Device-00-Device.analog-mono/#1: C-Media USB Audio Device Analog Mono
ports:
analog-input-microphone: Mikrofon (priority 8700, latency offset 0 usec, available: unknown)
properties:
device.icon_name = "audio-input-microphone"
analog-output: Analoge Ausgabe (priority 9900, latency offset 0 usec, available: unknown)
properties:
iec958-stereo-output: Digitaler Ausgang (S/PDIF) (priority 0, latency offset 0 usec, available: unknown)
properties:
index: 3
name: <alsa_card.usb-0d8c_C-Media_USB_Audio_Device-00-Device_1>
driver: <module-alsa-card.c>
owner module: 8
properties:
alsa.card = "2"
alsa.card_name = "C-Media USB Audio Device"
alsa.long_card_name = "C-Media USB Audio Device at usb-0000:00:1d.0-1.6, full speed"
alsa.driver_name = "snd_usb_audio"
device.bus_path = "pci-0000:00:1d.0-usb-0:1.6:1.0"
sysfs.path = "/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.6/2-1.6:1.0/sound/card2"
udev.id = "usb-0d8c_C-Media_USB_Audio_Device-00-Device_1"
device.bus = "usb"
device.vendor.id = "0d8c"
device.vendor.name = "C-Media Electronics, Inc."
device.product.id = "0008"
device.product.name = "C-Media USB Audio Device "
device.serial = "0d8c_C-Media_USB_Audio_Device"
device.string = "2"
device.description = "C-Media USB Audio Device "
module-udev-detect.discovered = "1"
device.icon_name = "audio-card-usb"
profiles:
input:analog-mono: Analog Mono Eingang (priority 1, available: unknown)
output:analog-stereo: Analog Stereo Ausgang (priority 6000, available: unknown)
output:analog-stereo+input:analog-mono: Analog Stereo Ausgang + Analog Mono Eingang (priority 6001, available: unknown)
output:iec958-stereo: Digital Stereo (IEC958) Ausgang (priority 5500, available: unknown)
output:iec958-stereo+input:analog-mono: Digital Stereo (IEC958) Ausgang + Analog Mono Eingang (priority 5501, available: unknown)
off: Aus (priority 0, available: unknown)
active profile: <input:analog-mono>
sources:
alsa_input.usb-0d8c_C-Media_USB_Audio_Device-00-Device_1.analog-mono/#2: C-Media USB Audio Device Analog Mono
ports:
analog-input-microphone: Mikrofon (priority 8700, latency offset 0 usec, available: unknown)
properties:
device.icon_name = "audio-input-microphone"
analog-output: Analoge Ausgabe (priority 9900, latency offset 0 usec, available: unknown)
properties:
iec958-stereo-output: Digitaler Ausgang (S/PDIF) (priority 0, latency offset 0 usec, available: unknown)
properties:
Cumprimentos
Hermann
Responder1
Eu descobri sozinho. Eu estava errado ao presumir que a opção "dispositivo" precisaria de um nome de dispositivo. Em vez disso, é necessário um nome de origem (ou coletor, dependendo do que você está tentando obter). Isso, por exemplo, me dá acesso ALSA a um microfone individual controlado pelo pulseaudio:
pcm.pulse_mic1 {
type pulse
device alsa_input.usb-0d8c_C-Media_USB_Audio_Device-00-Device.analog-mono
}
ctl.pulse_mic1 {
type pulse
device alsa_input.usb-0d8c_C-Media_USB_Audio_Device-00-Device.analog-mono
}