how convert wav pcm 44100 to a-law 8bit mono in c#

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hi i want convert pcm 44100 hz to wav ccitt a-law 8 bit mono 7 kb/s in my project in c# . plz help me what i must do ? thank you .

Posted 2-Nov-11 21:38pm

mohammad_118

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Bernhard Hiller 3-Feb-14 5:29am

Not necessarily a solution, but generally a good hint: look for applications which can do that conversion via command line, and call it with the appropriate parameters. That's normally the easiest way to do conversions.

2 solutions

Solution 1

Take a look at :

http://www.alvas.net/alvas.audio.aspx[^]

http://naudio.codeplex.com/[^]

Posted 2-Nov-11 21:44pm

Mehdi Gholam

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alvas · Accepted Answer · 2014-02-02T22:55:00

Try How convert wav pcm 44100 to a-law 8bit mono in c#[^]

C#

static void PcmToAlaw(string fileName)
{
    WaveReader wr = new WaveReader(File.OpenRead(fileName));
    IntPtr pcmFormat = wr.ReadFormat();
    FormatDetails[] fdArr = AudioCompressionManager.GetCompatibleFormatList(pcmFormat, true);
    foreach (FormatDetails fd in fdArr)
        {
        WaveFormat wf = AudioCompressionManager.GetWaveFormat(fd.FormatHandle);
        if (wf.wFormatTag == AudioCompressionManager.ALawFormatTag && wf.nChannels == 1)
        {
            IntPtr alawFormat = fd.FormatHandle;
            byte[] alawData = AudioCompressionManager.ToFormat(wr, alawFormat);
            WaveWriter ww = new WaveWriter(File.Create(fileName + ".wav"),
                AudioCompressionManager.FormatBytes(alawFormat));
            ww.WriteData(alawData);
            ww.Close();
            break;
        }
    }
}