Morse Code

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;


class morseCode
{
    private static void Main(string[] args)
    {
        string input = Console.ReadLine().ToUpper();


        // playsong(freq, duration);
        string result = "";
        for (int i = 0; i < input.Length; i++)
        {
            char testletter = input[i];
            switch (testletter)
            {
                case 'A': result += ".-"; break;
                case 'B': result += "-..."; break;
                case 'C': result += "-.-."; break;
                case 'D': result += "-.."; break;
                case 'E': result += "."; break;
                case 'F': result += "..-."; break;
                case 'G': result += "--."; break;
                case 'H': result += "...."; break;
                case 'I': result += ".."; break;
                case 'J': result += ".---"; break;
                case 'K': result += "-.-"; break;
                case 'L': result += ".-.."; break;
                case 'M': result += "--"; break;
                case 'N': result += "-."; break;
                case 'O': result += "--.-"; break;
                case 'P': result += ".--."; break;
                case 'Q': result += "--.-"; break;
                case 'R': result += ".-."; break;
                case 'S': result += "..."; break;
                case 'T': result += "-"; break;
                case 'U': result += "..--"; break;
                case 'V': result += "...-"; break;
                case 'W': result += ".--"; break;
                case 'X': result += "-.."; break;
                case 'Y': result += "-.--"; break;
                case 'Z': result += "--.."; break;
                default: result += "/"; break;



            }
        }


        for (int i = 0; i < result.Length; i++)
        {
            playsong(result[i]);
        }

        Console.WriteLine(result);
    }

    private static void playsong(char testchar)
    {
        int freq = 500;
        int duration = 500;
        switch (testchar)
        {
            case '.': Console.Beep(freq, duration); break;   //short
            case '-': Console.Beep(freq, duration * 2); break; //long
            case '/': Thread.Sleep(20); break; //pause
        }




    }

}