add audio file

data_utils/audio.py

@@ -82,8 +82,8 @@ class AudioSegment(object):
     def concatenate(cls, *segments):
         """Concatenate an arbitrary number of audio segments together.
 
-        :param *segments: Input audio segments.
-        :type *segments: AudioSegment
+        :param *segments: Input audio segments to be concatenated.
+        :type *segments: tuple of AudioSegment
         :return: Audio segment instance as concatenating results.
         :rtype: AudioSegment
         :raises ValueError: If the number of segments is zero, or if the 

data_utils/speech.py

@@ -69,8 +69,8 @@ class SpeechSegment(AudioSegment):
     def concatenate(cls, *segments):
         """Concatenate an arbitrary number of speech segments together.
 
-        :param *segments: Input speech segments.
-        :type *segments: SpeechSegment
+        :param *segments: Input speech segments to be concatenated.
+        :type *segments: tuple of SpeechSegment
         :return: Speech segment instance.
         :rtype: SpeechSegment
         :raises ValueError: If the number of segments is zero, or if the