Update app.py

app.py

@@ -196,7 +196,7 @@ def add_voice_labelv2(json_file, audio_path):
         begin_seq = True
         start_idx = 0
         
-        for i in range(len(voice_idxs)):
+        for i in range(len(voice_idxs)-1):
             if begin_seq:
                 start_idx = voice_idxs[i]
                 begin_seq = False