c# - 如何延长音频合成器的时间长度？

我使用http://soundfile.sapp.org/doc/WaveFormat/中的信息创建了一个音频合成器。

private const int SAMPLE_RATE = 44100;
private const short BITS_PER_SAMPLE = 16;
short[] asSoundValues = new short[SAMPLE_RATE]
float fFreq = 440;

for (int iValueCount = 0; iValueCount < SAMPLE_RATE; iValueCount++)
{
  asSoundValues[iValueCount] = Convert.ToInt16(short.MaxValue *
    Math.Sin(((Math.PI * 2 * fFreq) / SAMPLE_RATE) * iValueCount));
}

byte[] abBinarySoundValues = new byte[SAMPLE_RATE * sizeof(short)];
Buffer.BlockCopy(asSoundValues, 0, abBinarySoundValues, 0,
                   asSoundValues.Length * sizeof(short));
using (MemoryStream msMemoryStream = new MemoryStream())
{
  using (BinaryWriter bwBinaryWriter = new BinaryWriter(msMemoryStream))
  {
    short sBlockAlign = BITS_PER_SAMPLE / 8;
    int iSubChunkTwoSize = SAMPLE_RATE * sBlockAlign;
    bwBinaryWriter.Write(new[] { 'R', 'I', 'F', 'F' });
    bwBinaryWriter.Write(36 + iSubChunkTwoSize);
    bwBinaryWriter.Write(new[] { 'W', 'A', 'V', 'E', 'f', 'm', 't', ' ' });
    bwBinaryWriter.Write(16);
    bwBinaryWriter.Write((short)1);
    bwBinaryWriter.Write((short)1);
    bwBinaryWriter.Write(SAMPLE_RATE);
    bwBinaryWriter.Write(SAMPLE_RATE * sBlockAlign);
    bwBinaryWriter.Write(sBlockAlign);
    bwBinaryWriter.Write(BITS_PER_SAMPLE);
    bwBinaryWriter.Write(new[] { 'd', 'a', 't', 'a' });
    bwBinaryWriter.Write(iSubChunkTwoSize);
    bwBinaryWriter.Write(abBinarySoundValues);
    msMemoryStream.Position = 0;
    new SoundPlayer(msMemoryStream).Play();
  }
}

声音持续1秒钟。如何将声音延长到更长的时间-例如5秒？

最佳答案

根据wave format，Subchunk2Size最终决定了WAV的长度，这有助于我弄清楚除了样本数组之外所有必须更改的东西。因此，这些都是您必须进行的更改:

for (int iValueCount = 0; iValueCount < SAMPLE_RATE * numberOfSeconds; iValueCount++)
short[] asSoundValues = new short[SAMPLE_RATE * numberOfSeconds]
byte[] abBinarySoundValues = new byte[SAMPLE_RATE * sizeof(short) * numberOfSeconds];
int iSubChunkTwoSize = SAMPLE_RATE * sBlockAlign * numberOfSeconds;

关于c# - 如何延长音频合成器的时间长度？，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/64448379/