Create text-to-speech.md

Author: MichaelCurrin

recipes/python/text-to-speech.md

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+# Speech to test
+
+## Subprocess and say
+
+Using `say` which is builtin on macOS. But robotic and limited.
+
+```python
+import subprocess
+
+
+text_to_speak = "Hello, world!"
+subprocess.run(["say", text_to_speak])
+```
+
+
+## Using pyttsx3
+
+A free library for generating text to speech locally.
+
+Allows custom rate as below but still robotic.
+
+```sh
+pip install pyttsx3
+```
+
+```python
+import pyttsx3
+
+
+print("init")
+engine = pyttsx3.init()
+print("say")
+engine.say("I will speak this text")
+print("run")
+engine.runAndWait()
+
+
+rate = engine.getProperty("rate")
+print(rate)
+# 200.0
+engine.setProperty("rate", 150)
+
+engine.say("I will speak this text slower")
+engine.runAndWait()
+```