output.rb

    def play(*arguments)
      result = true
      arguments.each do |argument|
        case argument
        when Hash
          value = argument.delete(:value)
          play_ssml_for(value, argument)
        when RubySpeech::SSML::Speak
          play_ssml argument
        else
          play_ssml_for(argument)
        end
      end
    end

    def play!(*arguments)
      play *arguments || raise Adhearsion::PlaybackError, "One of the passed outputs is invalid"
    end