调用百度的site-package，不知道为什么不行，所以改用官方demo，直接手动post下载，再用playsound库直接读出来。

贴一下源码，感兴趣的也可以试试。前述步骤可以参考（再pip一个playsound包就行了）：https://blog.csdn.net/weixin_45974643/article/details/105567722

# -*- coding: utf-8 -*-
# @Time    : 2020/7/26 12:42
# @Author  : ChenYuxi
# @Email   : imchenyuxi@163.com
# @File    : TTSTest.py
# @Software: PyCharm

from playsound import playsound

import json
from urllib.request import urlopen
from urllib.request import Request
from urllib.error import URLError
from urllib.parse import urlencode
from urllib.parse import quote_plus

API_KEY = 'nu9r2plGFi3s1ugayDPSM6Mk'
SECRET_KEY = 'G62YGnq84eKTqu0mBgvdpmC6gNBzHdai'
TTS_URL = 'http://tsn.baidu.com/text2audio'
TOKEN_URL = 'http://openapi.baidu.com/oauth/2.0/token'
file_name = 'recognize.mp3'

TEXT = "正在识别，请稍候…………"
volume = 15     # 音量：0-15（默认5）
speed = 6       # 语速：0-15（默认5）
tone = 5        # 语调：0-15（默认5）
people = 4      # 人声：0-4，0-女声，1-男声，3-度逍遥（男），4-度丫丫（女）

"""
    获取token
"""


def fetch_token():
    params = {'grant_type': 'client_credentials',
              'client_id': API_KEY,
              'client_secret': SECRET_KEY}
    post_data = urlencode(params)
    post_data = post_data.encode('utf-8')
    req = Request(TOKEN_URL, post_data)
    try:
        f = urlopen(req, timeout=5)
        res = f.read()
    except URLError as err:
        print('token http response http code : ' + str(err.code))
        res = err.read()
    res = res.decode()
    
    result = json.loads(res)
    
    if 'access_token' in result.keys() and 'scope' in result.keys():
        if not 'audio_tts_post' in result['scope'].split(' '):
            print('please ensure has check the tts ability')
            exit()
        return result['access_token']
    else:
        print('please overwrite the correct API_KEY and SECRET_KEY')
        exit()


"""  TOKEN end """

if __name__ == '__main__':
    token = fetch_token()
    tex = quote_plus(TEXT)  # 此处TEXT需要两次urlencode
    params = {'tok': token, 'tex': tex, 'cuid': "quickstart",
              'lan': 'zh', 'ctp': 1,        # lan ctp 固定参数
              'vol': volume, 'per': people, 'spd': speed, 'pit': tone}
    data = urlencode(params)
    req = Request(TTS_URL, data.encode('utf-8'))
    has_error = False
    try:
        f = urlopen(req)
        result_str = f.read()
        headers = dict((name.lower(), value) for name, value in f.headers.items())
        has_error = ('content-type' not in headers.keys() or headers['content-type'].find('audio/') < 0)
    except URLError as err:
        print('http response http code : ' + str(err.code))
        result_str = err.read()
        has_error = True
    
    if has_error:
        save_file = "error.txt"
        result_str = str(result_str, 'utf-8')
        print("tts api  error:" + result_str)
    else:
        save_file = file_name
        
    with open(save_file, 'wb') as of:
        of.write(result_str)
        print("file saved as : " + save_file)
    
    playsound(save_file)

需要修改语速、语调、声音大小还有音库人声的可以直接修改参数，贴一个官方文档里的表格：

详细开发文档可以访问：https://ai.baidu.com/ai-doc/SPEECH/Gk38y8lzk