树莓派 centos7 命令行播放音乐

1.安装

yum install alsa-utils -y

2.查看音频输出设备

[root@centos-rpi3 mp3]# aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: ALSA [bcm2835 ALSA], device 0: bcm2835 ALSA [bcm2835 ALSA]
  Subdevices: 6/8
  Subdevice #0: subdevice #0
  Subdevice #1: subdevice #1
  Subdevice #2: subdevice #2
  Subdevice #3: subdevice #3
  Subdevice #4: subdevice #4
  Subdevice #5: subdevice #5
  Subdevice #6: subdevice #6
  Subdevice #7: subdevice #7
card 0: ALSA [bcm2835 ALSA], device 1: bcm2835 ALSA [bcm2835 IEC958/HDMI]
  Subdevices: 1/1
  Subdevice #0: subdevice #0

从上面可以看到两个设备0是耳机,1是HDMI,默认HDMI

3.播放音乐,用耳机

[root@centos-rpi3 mp3]# aplay -D hw:0,0 EverydayLove.wav 
Playing WAVE 'EverydayLove.wav' : Signed 16 bit Little Endian, Rate 44100 Hz, Stereo


如果不带设备参数,则会出错,因为我的HDMI木有设备

[root@centos-rpi3 mp3]# aplay  EverydayLove.wav 
ALSA lib pulse.c:243:(pulse_connect) PulseAudio: Unable to connect: 拒绝连接

aplay: main:722: audio open error: 拒绝连接


MP3不支持。。。




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