Hi guys,
I have a USB headset that the module is Edifier USB K800.
Plug it into the PC's usb port, and then I found "Digital Output
(S/PDIF)" audio port as below.
Would you please tell me why the Digital Output (S/PDIF) port has been
shown, and how to verify if this USB headset really have the output
function of Digital Output (S/PDIF), and how to close this audio port.
Thanks a lot!
-------------------------------------------------------------------------
$ pacmd list-cards
index: 3
name:
<alsa_card.usb-C-Media_Electronics_Inc._USB_PnP_Sound_Device-00>
driver: <module-alsa-card.c>
owner module: 27
properties:
alsa.card = "2"
alsa.card_name = "USB PnP Sound Device"
alsa.long_card_name = "C-Media Electronics Inc. USB PnP
Sound Device at usb-0000:03:00.3-2, full speed"
alsa.driver_name = "snd_usb_audio"
device.bus_path = "pci-0000:03:00.3-usb-0:2:1.0"
sysfs.path =
"/devices/pci0000:00/0000:00:08.1/0000:03:00.3/usb1/1-2/1-2:1.0/sound/card2"
udev.id =
"usb-C-Media_Electronics_Inc._USB_PnP_Sound_Device-00"
device.bus = "usb"
device.vendor.id = "0d8c"
device.vendor.name = "C-Media Electronics, Inc."
device.product.id = "013a"
device.product.name = "USB PnP Sound Device"
device.serial =
"C-Media_Electronics_Inc._USB_PnP_Sound_Device"
device.string = "2"
device.description = "USB PnP Sound Device"
module-udev-detect.discovered = "1"
device.icon_name = "audio-card-usb"
profiles:
input:analog-mono: Analog Mono Input (priority 7,
available: unknown)
output:analog-stereo: Analog Stereo Output (priority
6500, available: unknown)
output:analog-stereo+input:analog-mono: Analog Stereo
Output + Analog Mono Input (priority 6507, available: unknown)
output:iec958-stereo: Digital Stereo (IEC958) Output
(priority 5500, available: unknown)
output:iec958-stereo+input:analog-mono: Digital Stereo
(IEC958) Output + Analog Mono Input (priority 5507, available: unknown)
output:iec958-ac3-surround-51: Digital Surround 5.1
(IEC958/AC3) Output (priority 300, available: unknown)
output:iec958-ac3-surround-51+input:analog-mono:
Digital Surround 5.1 (IEC958/AC3) Output + Analog Mono Input (priority
307, available: unknown)
off: Off (priority 0, available: unknown)
active profile: <output:iec958-stereo+input:analog-mono>
sinks:
alsa_output.usb-C-Media_Electronics_Inc._USB_PnP_Sound_Device-00.iec958-stereo/#4:
USB PnP Sound Device Digital Stereo (IEC958)
sources:
alsa_output.usb-C-Media_Electronics_Inc._USB_PnP_Sound_Device-00.iec958-stereo.monitor/#6:
Monitor of USB PnP Sound Device Digital Stereo (IEC958)
alsa_input.usb-C-Media_Electronics_Inc._USB_PnP_Sound_Device-00.analog-mono/#7:
USB PnP Sound Device Analog Mono
ports:
analog-input-mic: Microphone (priority 8700, latency
offset 0 usec, available: unknown)
properties:
device.icon_name = "audio-input-microphone"
analog-output-speaker: Speakers (priority 10000,
latency offset 0 usec, available: unknown)
properties:
device.icon_name = "audio-speakers"
iec958-stereo-output: Digital Output (S/PDIF) (priority
0, latency offset 0 usec, available: unknown)
properties:
-------------------------------------------------------------------------
$ amixer -c 2 contents
numid=10,iface=CARD,name='Keep Interface'
; type=BOOLEAN,access=rw------,values=1
: values=off
numid=3,iface=MIXER,name='Mic Playback Switch'
; type=BOOLEAN,access=rw------,values=1
: values=off
numid=4,iface=MIXER,name='Mic Playback Volume'
; type=INTEGER,access=rw---R--,values=1,min=0,max=127,step=0
: values=0
| dBminmax-min=0.00dB,max=23.81dB
numid=7,iface=MIXER,name='Mic Capture Switch'
; type=BOOLEAN,access=rw------,values=1
: values=on
numid=8,iface=MIXER,name='Mic Capture Volume'
; type=INTEGER,access=rw---R--,values=1,min=0,max=16,step=0
: values=3
| dBminmax-min=0.00dB,max=23.81dB
numid=9,iface=MIXER,name='Auto Gain Control'
; type=BOOLEAN,access=rw------,values=1
: values=on
numid=5,iface=MIXER,name='Speaker Playback Switch'
; type=BOOLEAN,access=rw------,values=1
: values=on
numid=6,iface=MIXER,name='Speaker Playback Volume'
; type=INTEGER,access=rw---R--,values=2,min=0,max=151,step=0
: values=54,54
| dBminmax-min=-28.37dB,max=-0.06dB
numid=2,iface=PCM,name='Capture Channel Map'
; type=INTEGER,access=r----R--,values=1,min=0,max=36,step=0
: values=0
| container
| chmap-fixed=MONO
numid=1,iface=PCM,name='Playback Channel Map'
; type=INTEGER,access=r----R--,values=2,min=0,max=36,step=0
: values=0,0
| container
| chmap-fixed=FL,FR
----------------------------------------------------------------
Best regards,
Chengyi
