Audio Silverlight Speex以极快的速度播放

我使用Speex对原始数据进行编码，但在我解码数据后，音频播放速度更快，因为它让你听起来像一只花栗鼠。我正在使用和Silverlight 4

8kHz采样

编码功能：

    JSpeexEnc encoder = new JSpeexEnc();
    int rawDataSize = 0;
    public byte[] EncodeAudio(byte[] rawData)
    {
        var encoder = new SpeexEncoder(BandMode.Narrow);
        var inDataSize = rawData.Length / 2;
        var inData = new short[inDataSize];

        for (var index = 0; index < rawData.Length; index += 2)
        {
            inData[index / 2] = BitConverter.ToInt16(rawData, index);
        }
        inDataSize = inDataSize - inDataSize % encoder.FrameSize;

        var encodedData = new byte[rawData.Length];
        var encodedBytes = encoder.Encode(inData, 0, inDataSize, encodedData, 0, encodedData.Length);

        byte[] encodedAudioData = null;
        if (encodedBytes != 0)
        {
            encodedAudioData = new byte[encodedBytes];
            Array.Copy(encodedData, 0, encodedAudioData, 0, encodedBytes);
        }
        rawDataSize = inDataSize; // Count of encoded shorts, for debugging
        return encodedAudioData;
    }

    SpeexDecoder decoder = new SpeexDecoder(BandMode.Narrow);
    public byte[] Decode(byte[] encodedData)
    {
        try
        {
            short[] decodedFrame = new short[8000]; // should be the same number of samples as on the capturing side
            int decoderBytes = decoder.Decode(encodedData, 0, encodedData.Length, decodedFrame, 0, false);

            byte[] decodedData = new byte[encodedData.Length];
            byte[] decodedAudioData = null;

            decodedAudioData = new byte[decoderBytes * 2];
            for (int shortIndex = 0, byteIndex = 0; byteIndex < decoderBytes; shortIndex++)
            {
                BitConverter.GetBytes(decodedFrame[shortIndex + byteIndex]).CopyTo(decodedAudioData, byteIndex * 2);
                byteIndex++;
            }

            // todo: do something with the decoded data
            return decodedAudioData;
        }
        catch (Exception ex)
        {
            ShowMessageBox(ex.Message.ToString());
            return null;
        }

    }

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抱歉，伙计们反应太晚了，但我知道问题出在哪里了

在我的decode函数中，我循环遍历解码的

short

数组，但我只将一半字节复制到我的新

byte

数组中

它需要看起来像这样：

decodedAudioData = new byte[decoderBytes * 2];
for (int shortIndex = 0, byteIndex = 0; shortIndex < decodedFrame.Length; shortIndex++, byteIndex += 2)
{
    byte[] temp = BitConverter.GetBytes(decodedFrame[shortIndex]);
    decodedAudioData[byteIndex] = temp[0];
    decodedAudioData[byteIndex + 1] = temp[1];
}

decodedAudioData=新字节[decoderBytes*2]；
对于（int shortIndex=0，byteIndex=0；shortIndex

问题是什么还不太清楚。你能编辑你的问题吗？你能为你的

SavePcmToWav

方法添加源代码吗？如果生成的WAV文件的采样率为44.1kHz而不是8kHz，则会产生花栗鼠声音（即音频数据播放得太快）。

decodedAudioData = new byte[decoderBytes * 2];
for (int shortIndex = 0, byteIndex = 0; shortIndex < decodedFrame.Length; shortIndex++, byteIndex += 2)
{
    byte[] temp = BitConverter.GetBytes(decodedFrame[shortIndex]);
    decodedAudioData[byteIndex] = temp[0];
    decodedAudioData[byteIndex + 1] = temp[1];
}