Enable Sound Raspberry Pi sound output does not work by default. To enable it, as superuser, open /etc/modules in a text editor. Add this line to the end of the file: snd_bcm2835 Save and close the file. Sound is enabled when you reboot the Raspberry Pi.
树莓派的声音输出默认是关闭的。使用超级用户账号打开/etc/modules文件，文件尾部加入一行snd_bcm2835，保存，然后重启。声音就打开了。