Play sound at buton press

I want a sound player to play as long as a button is pressed.

Here is what I've done so far :

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Media;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace test
{
    public partial class Form1 : Form
    {
        private SoundPlayer soundPlayer;

        private void FormMain_KeyPress(object sender, KeyPressEventArgs e)        
        {
             if(e.KeyChar == 'n')
                  { 
                       SoundPlayer s = new SoundPlayer(@"C:\Users\darude_rig\Desktop\dayz sounboard\media\sounds\AKM.wav");
                       s.PlayLooping();
                  }
             }
        }
     }

Where is the problem and how can I fix it?