# File lib/rubygame/deprecated_mixer.rb, line 525
  def fade_out( fade_time )
    fade_time *= 1000 # convert to milliseconds

    result = SDL::Mixer.FadeOutMusic( fade_time )

    if( result < 0 )
      raise Rubygame::SDLError, "Error fading out music: #{SDL.GetError()}"
    end
  end