diff --git a/app.py b/app.py
new file mode 100644
index 0000000..0065a26
--- /dev/null
+++ b/app.py
@@ -0,0 +1,72 @@
+# -*- coding:utf-8 -*-
+"""
+拖单个音频倍速
+
+"""
+import os
+import re
+import subprocess
+import sys
+
+
+def get_files(path):
+    res = []
+    r = os.listdir(path)  # 列出文件夹下所有的目录与文件
+    for i in r:
+        file_path = os.path.join(path, i)
+        if os.path.isfile(file_path) and file_path.endswith('mp3'):
+            if re.match(r'.*x[\d\.]+\.mp3$', file_path):
+                continue
+            res.append(file_path)
+    return res
+
+
+def a_speed(input_file, speed, out_file):
+    try:
+        cmd = "ffmpeg.exe -y -i %s -filter_complex \"atempo=tempo=%s\" %s" % (input_file, speed, out_file)
+        res = subprocess.call(cmd, shell=True)
+
+        if res != 0:
+            return False
+        return True
+    except Exception:
+        return False
+
+
+def change_speed(file, x, error_info):
+    res = a_speed(file, x, re.sub(r'(\.mp3$)', f'_x{x}.mp3', file))
+    if not res:
+        error_info.append(f'{file} to {x} error')
+
+
+def handler_file(file):
+    error_info = []
+    change_speed(file, '1.5', error_info)
+    change_speed(file, '3', error_info)
+    print('*' * 20)
+    for i in error_info:
+        print(i)
+
+
+def handler_dir(root_dir):
+    files = get_files(root_dir)
+    error_info = []
+    for file in files:
+        change_speed(file, '1.5', error_info)
+        change_speed(file, '3', error_info)
+
+    print('*' * 20)
+    for i in error_info:
+        print(i)
+
+
+def run(path):
+    if os.path.isfile(path):
+        handler_file(path)
+    else:
+        handler_dir(path)
+
+
+if __name__ == "__main__":
+    path = sys.argv[1]
+    run(path)
diff --git a/ffmpeg.exe b/ffmpeg.exe
new file mode 100644
index 0000000..b0f97ea
Binary files /dev/null and b/ffmpeg.exe differ