>>> docker run -v /dev:/dev --privileged ...
进去后安装alsa-utils才能使用aplay
>>> aplay -f cd -c 1 -r 16000 demo.pcm
但发现并没有声音
但确实可以获取到声卡
>>> aplay -l
**** List of PLAYBACK Hardware Devices ****card 0: b1 [bcm2835 HDMI 1], device 0: bcm2835 HDMI 1 [bcm2835 HDMI 1]Subdevices: 4/4Subdevice #0: subdevice #0Subdevice #1: subdevice #1Subdevice #2: subdevice #2Subdevice #3: subdevice #3card 1: Headphones [bcm2835 Headphones], device 0: bcm2835 Headphones [bcm2835 Headphones]Subdevices: 4/4Subdevice #0: subdevice #0Subdevice #1: subdevice #1Subdevice #2: subdevice #2Subdevice #3: subdevice #3
这是由于默认的声卡选择错了，所以需要用配置文件选择一下默认声卡
>>> vim /etc/asound.conf
pcm.!default {type hwcard 1}ctl.!default {type hw card 1}
参考：/a/630048
