# File lib/rubygame/deprecated_mixer.rb, line 80
  def self.open_audio( frequency=nil, format=nil, channels=nil, buffer=nil )

    Rubygame.deprecated( "Rubygame::Mixer", "3.0" )

    frequency ||= 22050
    format    ||= SDL::Mixer::DEFAULT_FORMAT
    channels  ||= 2
    buffer    ||= 1024

    result = SDL::Mixer.OpenAudio(frequency, format, channels, buffer)

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

    return nil
  end