Convert LaTeX formulas to speech (Chinese language only)

Here is the quadratic formula: $x = \frac{-b \pm \sqrt{b^2-4ac}}{2a}$. Calculate carefully.

# coding=utf-8

import os
import dashscope
from dashscope.audio.tts_v2 import *

# Set your API key (format: sk-xxx). If not set as env var, uncomment the next line:
# dashscope.api_key = "sk-xxx"
dashscope.api_key = os.environ.get('DASHSCOPE_API_KEY')

dashscope.base_websocket_api_url='wss://dashscope-intl.aliyuncs.com/api-ws/v1/inference'

# Model
model = "cosyvoice-v3-flash"
# Voice (must be compatible with your model version)
#   cosyvoice-v3-flash/plus: longanyang, etc.
voice = "longanyang"

# Instantiate synthesizer with model and voice
synthesizer = SpeechSynthesizer(model=model, voice=voice)
# Send text and get binary audio
audio = synthesizer.call("This is the quadratic formula: $x = \\frac{-b \\pm \\sqrt{b^2-4ac}}{2a}$. Calculate it carefully.")
# First request includes WebSocket connection setup time
print('[Metric] requestId: {}, first-package delay: {} ms'.format(
  synthesizer.get_last_request_id(),
  synthesizer.get_first_package_delay()))

# Save audio to a local file
with open('output.mp3', 'wb') as f:
  f.write(audio)