vb在编写录音时，下面含义什么怎么理解录音格式

下面这些代码什么意思，我看不懂，谁能解释一下

  btwfxout(0).......btWfxOut(29)含义

Private Const WFXSize                      As Long = 128& * 1024&
Private btWfxOut()                          As Byte
Private lngWFXOutLen                        As Long

Public Sub SelectFormatMp3()  '32K 16bit mono Mp3
ReDim btWfxOut(WFXSize - 1) As Byte

      btWfxOut(0) = 85
        btWfxOut(1) = 0
        btWfxOut(2) = 1
          btWfxOut(3) = 0
          btWfxOut(4) = 34
            btWfxOut(5) = 86
            btWfxOut(6) = 0
              btWfxOut(7) = 0
              btWfxOut(8) = 160
                btWfxOut(9) = 15
                btWfxOut(10) = 0
btWfxOut(11) = 0
  btWfxOut(12) = 1
  btWfxOut(13) = 0
    btWfxOut(14) = 0
    btWfxOut(15) = 0
      btWfxOut(16) = 12
      btWfxOut(17) = 0
        btWfxOut(18) = 1
        btWfxOut(19) = 0
          btWfxOut(20) = 2

btWfxOut(21) = 0
  btWfxOut(22) = 0
  btWfxOut(23) = 0
    btWfxOut(24) = 104
    btWfxOut(25) = 0
      btWfxOut(26) = 1
      btWfxOut(27) = 0
        btWfxOut(28) = 113
        btWfxOut(29) = 5


        lngWFXOutLen = CLng(18) + CLng(12)


End Sub

Public Sub SelectFormatWav()  'PCM 16bit 22K mono

  ReDim btWfxOut(WFXSize - 1) As Byte

      btWfxOut(0) = 1
        btWfxOut(1) = 0
        btWfxOut(2) = 1
          btWfxOut(3) = 0
          btWfxOut(4) = 17
            btWfxOut(5) = 43
            btWfxOut(6) = 0
              btWfxOut(7) = 0
              btWfxOut(8) = 34
                btWfxOut(9) = 86
                btWfxOut(10) = 0
btWfxOut(11) = 0
  btWfxOut(12) = 2
  btWfxOut(13) = 0
    btWfxOut(14) = 16


        lngWFXOutLen = CLng(18) + CLng(0)


End Sub

Private Sub WriteWAVHdr()
    Dim udtHdr      As WAVRIFF
    Dim lngDataID  As Long
    Dim lngData    As Long

    With udtHdr
        .RIFF = WAV_RIFF
        .WAVE = WAV_WAVE
        .fmt = WAV_FMT
        .hdrlen = FileLength(hFOut) - 8
        .chnksize = lngWFXOutLen
    End With

    FileSeek hFOut, 0, FILE_BEGIN
    FileWrite hFOut, VarPtr(udtHdr), Len(udtHdr)

    FileWrite hFOut, VarPtr(btWfxOut(0)), lngWFXOutLen  '这个地方就是是将文件头写入，不同类型数据不一样

    lngDataID = WAV_DATA
    FileWrite hFOut, VarPtr(lngDataID), 4

    lngData = FileLength(hFOut) - (FilePosition(hFOut) + 4)
    FileWrite hFOut, VarPtr(lngData), 4
End Sub --------------------编程问答-------------------- 你使用UEDIT各打开一个MP3文件与WAV文件,看看对应字节的头部吧. --------------------编程问答-------------------- 友情Up................
--------------------编程问答-------------------- 对应字节的头部怎么看？请各位大哥赐教 --------------------编程问答-------------------- 推荐用NCTAudioStudio控件处理声音。 --------------------编程问答-------------------- 用vb编写录音软件时，如何直接使用mpeg layer-3 16kbit/s 11025Hz ，因为它的文件大小很小

补充：VB ,  API