Untitled

private void button1_Click(object sender, EventArgs e)
    {
        SoundTouchSharp st = new SoundTouchSharp();
        st.CreateInstance();
        st.SetTempo((float)0.1);
        st.SetPitch(8);

        SoundPlayer sp = new SoundPlayer();
        sp.SoundLocation = "./piano.wav";
        sp.Load();
        sp.Play();

        st.Dispose();
    }