智能台灯LeLampX快速入门教程-麦克风和扬声器测试(终端)

文章说明

• 本教程主要说明介绍如何进行麦克风和扬声器测试
• LeLamp2兼容LeLamp1的麦克风和扬声器测试方法，但也提供更便利的web测试方法
• 对于购买整机，测试都已经做好，可以直接使用

相关设备

• LeLamp2套件: 采购地址

操作步骤

• 测试前先调节一下音量

$ alsamixer -c 2

下图为能正常播放声音的参数，箭头对应修改为00。标记 MM = 静音；00 = 未静音，选中通道按 M 切换静音 / 取消静音。调整PCM，最重要，播放数字音乐

• 如果出现回音的声音，把Line，Line DAC和Line PGA声音调低一点

• 按F6按键，选择声卡：seeed2micvoicec

• 使用鼠标点击对应的声道，调节对应的音量

• 运行测试程序，播放一段测试音频

$ cd ~/lelampv2/scripts
$ ./play_test.sh

配置音频通道...
Simple mixer control 'Left Line Mixer DACL1',0
  Capabilities: pswitch pswitch-joined
  Playback channels: Mono
  Mono: Playback [on]
Simple mixer control 'Right Line Mixer DACR1',0
  Capabilities: pswitch pswitch-joined
  Playback channels: Mono
  Mono: Playback [on]
Simple mixer control 'Line DAC',0
  Capabilities: pvolume
  Playback channels: Front Left - Front Right
  Limits: Playback 0 - 118
  Mono:
  Front Left: Playback 118 [100%] [0.00dB]
  Front Right: Playback 118 [100%] [0.00dB]
Simple mixer control 'PCM',0
  Capabilities: pvolume
  Playback channels: Front Left - Front Right
  Limits: Playback 0 - 127
  Mono:
  Front Left: Playback 102 [80%] [-12.50dB]
  Front Right: Playback 102 [80%] [-12.50dB]
播放: /usr/share/sounds/alsa/Front_Center.wav
设备: plughw:2,0

Playing WAVE '/usr/share/sounds/alsa/Front_Center.wav' : Signed 16 bit Little Endian, Rate 48000 Hz, Mono

演示视频

<iframe height=498 width=100% src="//player.bilibili.com/player.html?isOutside=true&aid=116617405008779&bvid=BV1pZGt6nENp&cid=38525798869&p=1" scrolling="no" border="0" frameborder="no" framespacing="0" allowfullscreen="true"> </iframe>