Windows Phone 8.1 で、設定された周波数と持続時間でトーンを生成しようとしています。ここで提示されたトピックのフォローアップ: Playing a sound from a generated buffer in a Windows 8 app , これは、Visual Studio 2015 のシミュレーターで実行され、SharpDX.XAudio2 を実装しようとしている VB.NET で、Windows Phone 8.1 の私の試みたソリューションです。音は出ませんが、合っていると思います。何か案は？
' Initialization phase, keep this buffer during the life of your application
' Allocate 10s at 44.1Khz of stereo 16bit signals
Dim myBufferOfSamples = New Short(44100 * 10 * 2 - 1) {}
' Create a DataStream with pinned managed buffer
Dim ds = SharpDX.DataStream.Create(myBufferOfSamples, True, True)
Dim bu As New SharpDX.XAudio2.AudioBuffer
bu.Stream = ds
bu.AudioBytes = ds.Length
bu.Flags = SharpDX.XAudio2.BufferFlags.EndOfStream
'Fill myBufferOfSamples
Dim sampleBuffer() As Short = myBufferOfSamples
Dim sampleRate As Integer = 44100
Dim frequency As Double = 440
'
Dim totalTime As Double = 0
For i As Integer = 0 To sampleBuffer.Length - 2 Step 2
Dim sampleTime As Double = totalTime / sampleRate
Dim currentSample As Short
currentSample = Math.Sin(2 * Math.PI * frequency * sampleTime) * Short.MaxValue
sampleBuffer(i) = currentSample
sampleBuffer(i + 1) = currentSample
totalTime += 1
Next
' PCM 44.1Khz stereo 16 bit format
Dim waveFormat = New SharpDX.Multimedia.WaveFormat()
Dim xaudio As New SharpDX.XAudio2.XAudio2()
Dim masteringVoice As New SharpDX.XAudio2.MasteringVoice(xaudio)
Dim sourceVoice = New SharpDX.XAudio2.SourceVoice(xaudio, waveFormat, True)
' Submit the buffer
sourceVoice.SubmitSourceBuffer(bu, Nothing)