NodeMCU播放.wav或.mp3文件

1 回答

• 1

  一旦https://github.com/nodemcu/nodemcu-firmware/pull/1255登陆 dev 分支，您就可以执行以下操作as documented：

  -- ****************************************************************************
  -- Play file with pcm module.
  --
  -- Upload jump_8k.u8 to spiffs before running this script.
  --
  -- ****************************************************************************
  
  
  function cb_drained(d)
    print("drained "..node.heap())
  
    file.seek("set", 0)
    -- uncomment the following line for continuous playback
    --d:play(pcm.RATE_8K)
  end
  
  function cb_stopped(d)
    print("playback stopped")
    file.seek("set", 0)
  end
  
  function cb_paused(d)
    print("playback paused")
  end
  
  file.open("jump_8k.u8", "r")
  
  drv = pcm.new(pcm.SD, 1)
  
  -- fetch data in chunks of LUA_BUFFERSIZE (1024) from file
  drv:on("data", file.read)
  
  -- get called back when all samples were read from the file
  drv:on("drained", cb_drained)
  
  drv:on("stopped", cb_stopped)
  drv:on("paused", cb_paused)
  
  -- start playback
  drv:play(pcm.RATE_8K)
  

  音频预期为单声道原始无符号8位流，采样率介于1 k至16 k样本/秒之间 . 可以使用Audacity或SoX等OSS工具转换常规WAV文件 . 转换前调整音量 .

  回复于 2024-05-13T02:45:34+08:00