void Update()
    {
        /* Wait for audio clip of the output speech to finish before listening and converting
         * new input speech
         */
        if (stt.ServiceReady() && tts.ServiceReady() && chat.ServiceReady())
        {
            if (chat.GetStatus() == SimpleBot.ProcessingStatus.Processing || !tts.IsFinished())
            {
                stt.Active = false;
                stt.StopRecording();
            }
            else
            {
                stt.Active = true;
                stt.StartRecording();
            }
        }

        /* I used to need to keep track of all the processing steps to known when to do
         * the next step, i.e. when to ask for a chat response and when to convert to audio.
         * This is now triggered by listeners in InputFields. I still need to keep track
         * of processing to know when to record or stop recording speech as above.
         * /
         * /*
         * if (stt.GetStatus() == SpeechToText.ProcessingStatus.Processed && chat.ServiceReady())
         * {
         *  // GetResult obtains the result of the speech to text conversion and changes the speech input status to Idle.
         *  Runnable.Run(chat.ProcessChat(stt.GetResult()));
         * }
         */
        /*
         * if (chat.GetStatus() == SimpleBot.ProcessingStatus.Processed && tts.ServiceReady())
         * {
         *  // GetResult obtains the chat response and adds it to the queue for conversion to speech audio.
         *  tts.AddTextToQueue(chat.GetResult());
         * }
         */
    }
    void Update()
    {
        /* Wait for audio clip of the output speech to finish before listening and converting
         * new input speech
         */

        nearestBotIndex = GetNearestBotIndex();

        for (int i = 0; i < botList.Count; i++)
        {
            SpeechToText stt  = botList[i].GetComponentInChildren <SpeechToText>();
            TextToSpeech tts  = botList[i].GetComponentInChildren <TextToSpeech>();
            SimpleBot    chat = botList[i].GetComponentInChildren <SimpleBot>();

            if (stt.ServiceReady())
            {
                if (nearestBotIndex != i || chat.GetStatus() == SimpleBot.ProcessingStatus.Processing || !tts.IsFinished())
                {
                    stt.Active = false;
                    stt.StopRecording();
                }
                else
                {
                    stt.Active = true;
                    stt.StartRecording();
                    Debug.Log("Bot " + i + " is active.");
                }
            }
        }

        /* I used to need to keep track of all the processing steps to known when to do
         * the next step, i.e. when to ask for a chat response and when to convert to audio.
         * This is now triggered by listeners in InputFields. I still need to keep track
         * of processing to know when to record or stop recording speech as above.
         * /
         * /*
         * if (stt.GetStatus() == SpeechToText.ProcessingStatus.Processed && chat.ServiceReady())
         * {
         *  // GetResult obtains the result of the speech to text conversion and changes the speech input status to Idle.
         *  Runnable.Run(chat.ProcessChat(stt.GetResult()));
         * }
         */
        /*
         * if (chat.GetStatus() == SimpleBot.ProcessingStatus.Processed && tts.ServiceReady())
         * {
         *  // GetResult obtains the chat response and adds it to the queue for conversion to speech audio.
         *  tts.AddTextToQueue(chat.GetResult());
         * }
         */
    }