Voice tutorials: add HA OS to prereqs (#29420)

- fix some typos

source/voice_control/create_wake_word.markdown

@@ -10,9 +10,9 @@ Depending on the word, training a model on your own wake word may take a few ite
 
 ## Prerequisites
 
-- latest version of Home Assistant
+- Latest version of Home Assistant, installed with the Home Assistant Operating System
 - [M5Stack ATOM Echo Development Kit](https://shop.m5stack.com/products/atom-echo-smart-speaker-dev-kit?ref=NabuCasa)
-- successfully completed the [$13 voice assistant for Home Assistant](/voice_control/thirteen-usd-voice-remote/) tutorial
+- Successfully completed the [$13 voice assistant for Home Assistant](/voice_control/thirteen-usd-voice-remote/) tutorial
 
 ## To create your own wake word
 

source/voice_control/thirteen-usd-voice-remote.markdown

@@ -9,9 +9,9 @@ your smart home. Issue commands and get responses!
 <lite-youtube videoid="ziebKt4XLZQ" videotitle="Wake word demo on $13 ATOM Echo in Home Assistant
 "></lite-youtube>
 
-## Required material
+## Prerequisites
 
-- Home Assistant 2023.10
+- Home Assistant 2023.10, installed with the Home Assistant Operating System
 - [Home Assistant Cloud](https://www.nabucasa.com) or a manually configured [Assist Pipeline](/voice_control/voice_remote_local_assistant)
 - The password to your 2.4&nbsp;GHz Wi-Fi network
 - Chrome (or a Chromium-based browser like Edge) on desktop (not Android/iOS)

source/voice_control/using_voice_assistants_overview.markdown

@@ -9,7 +9,7 @@ But you can make Assist the default digital assistant and [start it on an Androi
 
 You can also create your own [custom sentences](/voice_control/custom_sentences/#adding-a-custom-sentence-to-trigger-an-automation) to start an automation. For example, you could say "Clean the floor when I'm gone" to start the vacuum after you left your home zone. For the full list of new features and some videos, head over to the [chapter 3 blog post](/blog/2023/07/20/year-of-the-voice-chapter-3/) or watch the stream.
 
-<lite-youtube videoid="sXzItFksYFA" videotitle="Year of the Voice CHapter 3"></lite-youtube>
+<lite-youtube videoid="sXzItFksYFA" videotitle="Year of the Voice Chapter 3"></lite-youtube>
 
 While the video below does not include these latest changes, it gives a good overview of some of the basics.
 

source/voice_control/voice_remote_local_assistant.markdown

@@ -10,6 +10,10 @@ The speech-to-text option is [Whisper](https://github.com/openai/whisper). It's
 
 For text-to-speech we have developed [Piper](https://github.com/rhasspy/piper). Piper is a fast, local neural text-to-speech system that sounds great and is optimized for the Raspberry Pi 4. It supports [many languages](https://rhasspy.github.io/piper-samples/). On a Raspberry Pi, using medium quality models, it can generate 1.6s of voice in a second.
 
+## Prerequisites
+
+- Home Assistant Operating System
+
 ## Installing a local Assist pipeline
 
 For the quickest way to get your local Assist pipeline started, follow these steps:

source/voice_control/worlds-most-private-voice-assistant.markdown

@@ -1,5 +1,5 @@
 ---
-title: "World's Most Private Voice Assistant"
+title: "World's most private voice assistant"
 ---
 
 This tutorial will guide you to turn your old landline phone into the
@@ -29,8 +29,8 @@ your smart home and issue commands and get responses.
    - Once the Grandstream has booted, the two LEDs for power and Ethernet light up solid blue. The phone LED won't light up.
 4. Identify the IP address of the Grandstream.
    - If your phone has a star * key, you can get your phone to tell you it's IP address:
-      -  Press *** (press the star key three times) and wait until you hear *Enter the menu option*.
-      -  Press 02 and the phone will tell you its IP address.
+      - Press *** (press the star key three times) and wait until you hear *Enter the menu option*.
+      - Press 02 and the phone will tell you its IP address.
    - If your phone does not have a star * key, log onto your router to find the IP address.
 5. Enter the IP address into a browser window and log onto the Grandstream *Device Configuration* software.
    - The default credentials are:
@@ -62,8 +62,8 @@ your smart home and issue commands and get responses.
 4. Congratulations! You set up your analog phone to work with Home Assistant. Now pick up the phone and control your device.
    - Say a [supported voice command](/voice_control/builtin_sentences/). For example, *Turn off the light in the kitchen*.
    - You can also ask a question, such as
-     -  *Is the front door locked?*
-     -  *Which lights are on in the living room?*
+     - *Is the front door locked?*
+     - *Which lights are on in the living room?*
    - Make sure you're using the area name as you defined it in Home Assistant. If you have a room called *bathroom*, the phrase *Turn on the lights in the bath* won't work.
    - Your command is not supported? [Add your own commands](/integrations/conversation/).
 
@@ -104,6 +104,7 @@ You were able to control Home Assistant over the phone but it no longer works. W
 The [debug information](/voice_control/troubleshooting#view-debug-information) shows no runs.
 
 **Potential remedy**
+
 1. Log onto the Grandstream *Device Configuration* software.
 2. On the **Status** page, check if the **Hook** status changes from **On Hook** to **In Use** after you picked up the phone.
    ![Check the Grandstream status](/images/assist/grandstream-troubleshoot-10.png)