gistfile1.rb

 #Method to create files themselves, takes the texts, creates the file and returns the filename
  def surveys_create_file(text)
 
    case engine
    #Cepstral speech engine, see http://www.cepstral.com, as it requires a license
    when "cepstral"
      filename = '/var/lib/asterisk/sounds' + new_guid + ".wav"
      system("swift -o #{filename} -p audio/channels=1,audio/sampling-rate=8000 '#{text}'")
    #Festival OSS speech engine
    #on CentOS v5.0+ simply do a yum install festival
    when "festival"
      filename = '/var/lib/asterisk/sounds' + new_guid + ".ulaw"
      system("echo #{text} | text2wave -o #{filename} -otype ulaw")
    #Currently uses the built in OSX TTS engine 'say' which is part of PlainTalk 
    #http://en.wikipedia.org/wiki/Plaintalk
    when "osx_say"
      filename = '/var/lib/asterisk/sounds' + new_guid
      system("say -v Alex} -o #{filename}.aiff #{text}")
      system("sox #{filename}.aiff -r 8000 -t ul #{filename}.ulaw")
    end
    
    return filename
  end