c# - 是否有很好的 kernel32 蜂鸣声(板载蜂鸣声)？

我想知道是否有人找到了一个很好的哔哔声组合，这实际上听起来像音乐。

这是调用方法的方法。

[DllImport("Kernel32.dll")]
public static extern bool Beep(UInt32 frequency, UInt32 duration);
// ...
// call
Beep(2000, 400);

我的第一次尝试:

    for (int j = 1; j < 20; j++)
    {
        for (int i = 1; i <= 10; i++)
        {
            Console.Beep(300 * i, 200);
        }
    }

最佳答案

您可以使用以下简单程序来使用 Beep 播放旋律:

using System;
using System.Runtime.InteropServices;

class MelodyPlayer
{
    const double ConcertPitch = 440.0;

    class Note
    {
        [DllImport("Kernel32.dll")]
        public static extern bool Beep(UInt32 frequency, UInt32 duration);

        public const int C = -888;
        public const int CSharp = -798;
        public const int DFlat = CSharp;
        public const int D = -696;
        public const int DSharp = -594;
        public const int EFlat = DSharp;
        public const int E = -498;
        public const int F = -390;
        public const int FSharp = -300;
        public const int GFlat = FSharp;
        public const int G = -192;
        public const int GSharp = -96;
        public const int AFlat = GSharp;
        public const int A = 0;
        public const int ASharp = 108;
        public const int BFlat = ASharp;
        public const int B = 204;

        public int Key { get; set; }
        public int Octave { get; set; }
        public uint Duration { get; set; }

        public Note(int key, int octave, uint duration)
        {
            this.Key = key;
            this.Octave = octave;
            this.Duration = duration;
        }

        public uint Frequency
        {
            get
            {
                double factor = Math.Pow(2.0, 1.0 / 1200.0);
                return ((uint)(MelodyPlayer.ConcertPitch * Math.Pow(factor, this.Key + this.Octave * 1200.0)));
            }
        }

        public void Play()
        {
            Beep(this.Frequency, this.Duration);
        }
    }

    static void Main(string[] args)
    {
        Note[] melody = new Note[] {
            new Note(Note.C, 0, 100),
            new Note(Note.C, 0, 100),
            new Note(Note.D, 0, 100),
            new Note(Note.E, 0, 100),
            new Note(Note.F, 0, 100),
            new Note(Note.G, 0, 100),
            new Note(Note.A, 0, 100),
            new Note(Note.B, 0, 100),
            new Note(Note.C, 1, 100),
            new Note(Note.D, 1, 100),
            new Note(Note.E, 1, 100),
            new Note(Note.F, 1, 100),
            new Note(Note.G, 1, 100),
            new Note(Note.A, 1, 100),
            new Note(Note.B, 1, 100),
            new Note(Note.C, 2, 100)
        };

        foreach (var note in melody)
        {
            note.Play();
        }
    }
}

对于那些感兴趣的人:这使用了 Werckmeister temperament 并根据为此气质定义的 Cent 值计算频率。

关于c# - 是否有很好的 kernel32 蜂鸣声(板载蜂鸣声)？，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/3319959/