我的虚拟输出有问题。
paCMD 的输出list-sinks是：
$list-sinks
1 sink(s) available.
* index: 0
name: <auto_null>
driver: <module-null-sink.c>
flags: DECIBEL_VOLUME LATENCY DYNAMIC_LATENCY
state: SUSPENDED
suspend cause: IDLE
priority: 1000
volume: front-left: 99957 / 153% / 11.00 dB, front-right: 99957 / 153% / 11.00 dB
balance 0.00
base volume: 65536 / 100% / 0.00 dB
volume steps: 65537
muted: no
current latency: 0.00 ms
max request: 4 KiB
max rewind: 4 KiB
monitor source: 1
sample spec: s16le 2ch 44100Hz
channel map: front-left,front-right
Stereo
used by: 0
linked by: 1
configured latency: 0.00 ms; range is 0.50 .. 2000.00 ms
module: 12
properties:
device.description = "Dummy Output"
device.class = "abstract"
device.icon_name = "audio-card"
paCMD 的输出list-cards是：
$list-cards
1 card(s) available.
index: 0
name: <alsa_card.platform-bytcht_es8316>
driver: <module-alsa-card.c>
owner module: 7
properties:
alsa.card = "0"
alsa.card_name = "bytcht-es8316"
alsa.long_card_name = "WS-STORMBOOKSB1401-WS001-STORMBOOKSB1401"
alsa.driver_name = "snd_soc_sst_byt_cht_es8316"
device.bus_path = "platform-bytcht_es8316"
sysfs.path = "/devices/pci0000:00/808622A8:00/bytcht_es8316/sound/card0"
device.form_factor = "internal"
device.string = "0"
device.description = "Built-in Audio"
module-udev-detect.discovered = "1"
device.icon_name = "audio-card"
profiles:
input:analog-mono: Analog Mono Input (priority 2, available: unknown)
off: Off (priority 0, available: unknown)
active profile: <input:analog-mono>
sources:
alsa_input.platform-bytcht_es8316.analog-mono/#0: Built-in Audio Analog Mono
ports:
analog-input: Analog Input (priority 10000, latency offset 0 usec, available: unknown)
properties:
...然而 alsa 却这么认为：
$aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: bytchtes8316 [bytcht-es8316], device 0: 3 []
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: bytchtes8316 [bytcht-es8316], device 1: Deep-Buffer Audio (*) []
Subdevices: 1/1
Subdevice #0: subdevice #0