查看“使用命令播放音频的方法”的源代码

'''1、耳机接口播放音频测试'''<br><br>
1) 首先将耳机插入开发板的耳机孔中<br><br>
[[Image:Pi-5-details2-pic15.png]]<br><br>
2) 然后可以通过 '''aplay -l''' 命令可以查看下 linux 系统支持的声卡设备，从下面的输出可知，'''card 2''' 为 es8388 的声卡设备，也就是耳机的声卡设备<br>
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|orangepi@orangepi:~$ '''aplay -l'''<br>
 ****List of PLAYBACK Hardware Devices ****<br>
card 0: rockchipdp0 [rockchip-dp0], device 0: rockchip-dp0 spdif-hifi-0 [rockchip-dp0 spdif-hifi-0] Subdevices: 1/1<br>
Subdevice #0: subdevice #0<br>
card 1: rockchiphdmi0 [rockchip-hdmi0], device 0: rockchip-hdmi0 i2s-hifi-0 [rockchip-hdmi0 i2s-hifi-0]<br>
Subdevices: 1/1<br>
Subdevice #0: subdevice #0<br>
<span style="color:#0066CC;">card 2: rockchipes8388 [rockchip-es8388], device 0: dailink-multicodecs ES8323.6-0010-0 [dailink-multicodecs ES8323.6-0010-0]</span><br>
<span style="color:#0066CC;">Subdevices: 1/1</span><br>
<span style="color:#0066CC;">Subdevice #0: subdevice #0</span>
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3) 然后使用 '''aplay''' 命令播放下系统自带的音频文件，如果耳机能听到声音说明硬件能正常使用<br>
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|rangepi@orangepi:~$ '''aplay -D hw:<span style="color:#FF0000">2</span>,0 /usr/share/sounds/alsa/audio.wav'''<br>
Playing WAVE 'audio.wav' : Signed 16 bit Little Endian, Rate 44100 Hz, Stereo
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