linux 测试麦克风

如何查看音频设备

如果你的系统有 /proc/asound/cards 路径,说明 ALSA 驱动已经使用上,可查看 sound devices:

cat /proc/asound/cards
 0 [Intel          ]: HDA-Intel - HDA Intel
                      HDA Intel at 0xf2520000 irq 17

也可以用 arecord 和 aplay 工具.其中 arecord 查看 microphone (capture or input device):

$ arecord -l
**** List of CAPTURE Hardware Devices ****
card 0: Intel [HDA Intel], device 0: HDA Generic [HDA Generic]
  Subdevices: 1/1
  Subdevice #0: subdevice #0

aplay 查看 speaker (output device) :

$ aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: Intel [HDA Intel], device 0: HDA Generic [HDA Generic]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: Intel [HDA Intel], device 3: INTEL HDMI [INTEL HDMI] Subdevices: 1/1 Subdevice #0: subdevice #0 

使用 arecord 测试 microphone

运行下面命令,录音 10 秒:

$ arecord -d 10 /tmp/t.wav

播放 arecord 的录音

$ aplay /tmp/t.wav