diff --git a/voice_recognition.py b/voice_recognition.py
index 8c0b5fd..8986b1e 100644
--- a/voice_recognition.py
+++ b/voice_recognition.py
@@ -46,7 +46,7 @@ class WaveWriter:
         self.present_file_id = 0
         self.file_name_past = None
 
-        self.file_name_present = location + self.username + "_" + str(self.present_file_id)
+        self.file_name_present = location + self.username + "_" + str(self.present_file_id) + ".mp3"
         self.transcript_file_present : wave.Wave_write = wave.open(
             self.file_name_present, "wb"
         )
@@ -54,7 +54,7 @@ class WaveWriter:
         self.transcript_file_present.setsampwidth(SAMPLE_WIDTH)
         self.transcript_file_present.setframerate(SAMPLING_RATE)
 
-        self.file_name_future = location + self.username + "_" + str(self.present_file_id + 1)
+        self.file_name_future = location + self.username + "_" + str(self.present_file_id + 1) + ".mp3"
         self.transcript_file_future : wave.Wave_write = wave.open(
             self.file_name_future, "wb"
         )
@@ -69,7 +69,7 @@ class WaveWriter:
         self.present_file_id += 1
         self.file_name_present = self.file_name_future
         self.transcript_file_present = self.transcript_file_future
-        self.file_name_future = location + self.username + "_" + str(self.present_file_id + 1)
+        self.file_name_future = location + self.username + "_" + str(self.present_file_id + 1) + ".mp3"
         self.transcript_file_future : wave.Wave_write = wave.open(
             self.file_name_future, "wb"
         )
@@ -95,7 +95,7 @@ class SRBuffer(voice_recv.AudioSink):
     """
     # on member join dodajemytypa do listy
     # on member disconnect - dropujemy go
-    def __init__(self, destination):
+    def __init__(self):
         super().__init__()
         
         self.wavewriter = {
@@ -103,11 +103,11 @@ class SRBuffer(voice_recv.AudioSink):
         }
 
     def on_user_connect(self, username):
-        self.wavewriter[username] = WaveWriter(username)
+        self.wavewriter[str(username)] = WaveWriter(username)
 
     def on_user_disconnect(self,username):
-        self.wavewriter[username].cleanup()
-        self.wavewriter.pop(username)
+        self.wavewriter[str(username)].cleanup()
+        self.wavewriter.pop(str(username))
 
     def rotate_user(self,username):
         self.wavewriter[str(username)].rotate()
@@ -131,7 +131,7 @@ class Transcriber(commands.Cog):
     def __init__(self, bot):
         self.bot = bot
         self._last_member = None
-        self.wsink = SRBuffer(destination="/home/pi/Conjurer/wav.wav")
+        self.wsink = SRBuffer()
         self.threads = []
         self.comm_queue = Queue()