azure TTS from text files to mp3s

[snippsat]

Have you looked at response content print(response) to see if it's really is a binary format you get back?
Here a example found online you can try.

import requests
import json

# Replace with your Text to Speech subscription key
subscription_key = "YOUR_SUBSCRIPTION_KEY"

# Replace with the voice you want to use
voice = "en-US-Jessa24kRUS"

# Replace with the text you want to convert to speech
text = "Hello, this is an example of the Text to Speech API."

# Specify the language and format of the audio file
headers = {
    "Ocp-Apim-Subscription-Key": subscription_key,
    "Content-Type": "application/ssml+xml",
    "X-Microsoft-OutputFormat": "riff-24khz-16bit-mono-pcm",
    "User-Agent": "YOUR_RESOURCE_NAME"
}

# Create the SSML request
body = "<speak version='1.0' xml:lang='en-us'><voice xml:lang='en-us' xml:gender='Female' name='" + \
    voice + "'>" + text + "</voice></speak>"

# Make the request to the Text to Speech API
response = requests.post("https://YOUR_REGION.tts.speech.microsoft.com/cognitiveservices/v1", headers=headers, data=body)

# Save the generated audio file
with open("output.wav", "wb") as audio_file:
    audio_file.write(response.content)
print("The file has been saved to output.wav.")