diff --git a/API_reference.py b/API_reference.py
index c00c733..0ad93ef 100644
--- a/API_reference.py
+++ b/API_reference.py
@@ -118,6 +118,7 @@ guan.plot_contour(x, y, matrix, xlabel='x', ylabel='y', title='', filename='a',
 guan.download_with_scihub(address=None, num=1)
 
 # audio
+guan.str_to_audio(str='hello world', rate=125, voice=1, read=1, save=0, print_text=0)
 guan.txt_to_audio(txt_path, rate=125, voice=1, read=1, save=0, print_text=0)
 content = guan.pdf_to_text(pdf_path)
 guan.pdf_to_audio(pdf_path, rate=125, voice=1, read=1, save=0, print_text=0)
\ No newline at end of file
diff --git a/PyPI/setup.cfg b/PyPI/setup.cfg
index 7429fa8..025356a 100644
--- a/PyPI/setup.cfg
+++ b/PyPI/setup.cfg
@@ -1,7 +1,7 @@
 [metadata]
 # replace with your username:
 name = guan
-version = 0.0.14
+version = 0.0.15
 author = guanjihuan
 author_email = guanjihuan@163.com
 description = An open source python package
diff --git a/PyPI/src/guan/audio.py b/PyPI/src/guan/audio.py
index 76bb8a1..138dfe2 100644
--- a/PyPI/src/guan/audio.py
+++ b/PyPI/src/guan/audio.py
@@ -2,6 +2,22 @@
 
 # audio
 
+def str_to_audio(str='hello world', rate=125, voice=1, read=1, save=0, print_text=0):
+    import pyttsx3
+    if print_text==1:
+        print(str)
+    engine = pyttsx3.init()
+    voices = engine.getProperty('voices')  
+    engine.setProperty('voice', voices[voice].id)
+    engine.setProperty("rate", rate)
+    if save==1:
+        engine.save_to_file(str, 'str.mp3')
+        engine.runAndWait()
+        print('MP3 file saved!')
+    if read==1:
+        engine.say(str)
+        engine.runAndWait()
+
 def txt_to_audio(txt_path, rate=125, voice=1, read=1, save=0, print_text=0):
     import pyttsx3
     f = open(txt_path, 'r', encoding ='utf-8')