byte-beat.cs

using System;
using System.IO;
using System.Media;

namespace WavFileTest
{
    class Program
    {
        static void Main(string[] args)
        {
            using (var stream = new MemoryStream())
            {
                var writer = new BinaryWriter(stream);

                writer.Write("RIFF".ToCharArray());  // chunk id
                writer.Write((UInt32)0);             // chunk size
                writer.Write("WAVE".ToCharArray());  // format

                writer.Write("fmt ".ToCharArray());  // chunk id
                writer.Write((UInt32)16);            // chunk size
                writer.Write((UInt16)1);             // audio format

                var channels = 1;
                var sample_rate = 8000;
                var bits_per_sample = 8;

                writer.Write((UInt16)channels);
                writer.Write((UInt32)sample_rate);
                writer.Write((UInt32)(sample_rate * channels * bits_per_sample / 8)); // byte rate
                writer.Write((UInt16)(channels * bits_per_sample / 8));               // block align
                writer.Write((UInt16)bits_per_sample);

                writer.Write("data".ToCharArray());

                var seconds = 20;

                var data = new byte[sample_rate * seconds];

                for (var t = 0; t < data.Length; t++)
                    data[t] = (byte)(
                        t & t >> 8
                        //t * (42 & t >> 10)
                        //t | t % 255 | t % 257
                        //t * (t >> 9 | t >> 13) & 16
                        );

                writer.Write((UInt32)(data.Length * channels * bits_per_sample / 8));

                foreach (var elt in data) writer.Write(elt);

                writer.Seek(4, SeekOrigin.Begin);                     // seek to header chunk size field
                writer.Write((UInt32)(writer.BaseStream.Length - 8)); // chunk size

                stream.Seek(0, SeekOrigin.Begin);

                new SoundPlayer(stream).PlaySync();
            }
        }
    }
}