3

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);
        }            
    }
4

5 回答 5

10

您可以使用以下简单的程序来播放旋律Beep

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 气质,并根据为此气质定义的Cent值计算频率。

于 2010-07-23T16:39:18.330 回答
2

Beep 函数由 QBasic 的 Play 命令包装。很多谷歌点击了那个,这是首选。编写代码来翻译 Play 字符串可能比复制粘贴更有趣。语法在此处描述

于 2010-07-23T16:22:39.917 回答
1

检查谷歌单声道铃声,然后用十六进制编辑器打开文件并对歌曲进行逆向工程。如果您的程序将读取原始文件并将其即时转换为哔哔声,则可获得奖励积分。

于 2010-07-23T16:29:46.053 回答
1

还有System.Console.Beep.

于 2010-07-23T15:59:35.600 回答
0

曾经有一个声音驱动程序可以将 PC 扬声器用作 PCM 音频设备(声卡)

于 2010-07-23T16:04:10.460 回答