在 windows 中生成声音频率 - VB.Net

Question

我需要在 windows 中生成方波声音。我正在使用此代码：

System.console.beep(500,500)

但效果不是很好：播放声音需要一点时间。 我有一个 2.7 GHZ 的 CPU，所以我不认为我的电脑很慢。

有人知道在 windows 中播放频率的库或其他代码吗？

Answer 1

进口：

Imports System.IO
Imports System.Media

呼叫：

FrequencyBeep(500, 500, 10000)

子：

Public Shared Sub FrequencyBeep(ByVal Amplitude As Integer, ByVal Frequency As Integer, ByVal Duration As Integer)
    Dim A As Double = ((Amplitude * (System.Math.Pow(2, 15))) / 1000) - 1
    Dim DeltaFT As Double = 2 * Math.PI * Frequency / 44100.0
    Dim Samples As Integer = 441 * Duration / 10
    Dim Bytes As Integer = Samples * 4

    Dim Hdr As Integer() = {1179011410, 36 + Bytes, 1163280727, 544501094, 16, 131073, 44100, 176400, 1048580, 1635017060, Bytes}

    Using MS As MemoryStream = New MemoryStream(44 + Bytes)

        Using BW As BinaryWriter = New BinaryWriter(MS)

            For I As Integer = 0 To Hdr.Length - 1
                BW.Write(Hdr(I))
            Next

            For T As Integer = 0 To Samples - 1
                Dim Sample As Short = System.Convert.ToInt16(A * Math.Sin(DeltaFT * T))
                BW.Write(Sample)
                BW.Write(Sample)
            Next

            BW.Flush()
            MS.Seek(0, SeekOrigin.Begin)

            Using SP As SoundPlayer = New SoundPlayer(MS)
                SP.PlaySync()
            End Using
        End Using
    End Using
End Sub