diff --git a/README.md b/README.md
index 26b6525..dd77ed0 100644
--- a/README.md
+++ b/README.md
@@ -33,6 +33,8 @@ Please, cite us. [Bibtex citation](http://www.afnlp.org/conferences/ijcnlp2023/p
 
 1) ``pip install librosa`` -- audio processing library
 
+Note: for the VAD I need to `pip install torch torchaudio`.
+
 2) Whisper backend.
 
 Two alternative backends are integrated. The most recommended one is [faster-whisper](https://github.com/guillaumekln/faster-whisper) with GPU support. Follow their instructions for NVIDIA libraries -- we succeeded with CUDNN 8.5.0 and CUDA 11.7. Install with `pip install faster-whisper`.
diff --git a/whisper_online.py b/whisper_online.py
index 7df7682..4ecd2f7 100644
--- a/whisper_online.py
+++ b/whisper_online.py
@@ -1,7 +1,7 @@
 #!/usr/bin/env python3
 import sys
 import numpy as np
-import librosa  
+import librosa
 from functools import lru_cache
 import time
 import datetime
diff --git a/whisper_online_server.py b/whisper_online_server.py
index ffd597f..571bfb6 100644
--- a/whisper_online_server.py
+++ b/whisper_online_server.py
@@ -30,11 +30,12 @@ print(f"Loading Whisper {size} model for {language}...",file=sys.stderr,end=" ",
 if args.backend == "faster-whisper":
     from faster_whisper import WhisperModel
     asr_cls = FasterWhisperASR
-else:
+elif args.backend == "whisper_timestamped":
     import whisper
-    import whisper_timestamped
-#    from whisper_timestamped_model import WhisperTimestampedASR
+    from whisper_online import WhisperTimestampedASR
     asr_cls = WhisperTimestampedASR
+else:
+    raise ValueError(f"Unknown {args.backend=}")
 
 asr = asr_cls(modelsize=size, lan=language, cache_dir=args.model_cache_dir, model_dir=args.model_dir)
 
@@ -44,25 +45,23 @@ if args.task == "translate":
 else:
     tgt_language = language
 
-e = time.time()
-print(f"done. It took {round(e-t,2)} seconds.",file=sys.stderr)
+print(f"done. It took {round(time.time()-t,2)} seconds.",file=sys.stderr)
 
 if args.vad:
     print("setting VAD filter",file=sys.stderr)
     asr.use_vad()
 
 
-min_chunk = args.min_chunk_size
-
 if args.buffer_trimming == "sentence":
     tokenizer = create_tokenizer(tgt_language)
 else:
     tokenizer = None
 if not args.vac:
+    from whisper_online import OnlineASRProcessor
     online = OnlineASRProcessor(asr,tokenizer,buffer_trimming=(args.buffer_trimming, args.buffer_trimming_sec))
 else:
-    from whisper_online_vac import *
-    online = VACOnlineASRProcessor(min_chunk, asr,tokenizer,buffer_trimming=(args.buffer_trimming, args.buffer_trimming_sec))
+    from whisper_online_vac import VACOnlineASRProcessor
+    online = VACOnlineASRProcessor(args.min_chunk_size, asr,tokenizer,buffer_trimming=(args.buffer_trimming, args.buffer_trimming_sec))
 
 
 demo_audio_path = "cs-maji-2.16k.wav"
@@ -219,7 +218,7 @@ with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
         conn, addr = s.accept()
         logging.info('INFO: Connected to client on {}'.format(addr))
         connection = Connection(conn)
-        proc = ServerProcessor(connection, online, min_chunk)
+        proc = ServerProcessor(connection, online, args.min_chunk_size)
         proc.process()
         conn.close()
         logging.info('INFO: Connection to client closed')
diff --git a/whisper_online_vac.py b/whisper_online_vac.py
index 3f7c739..f323d38 100644
--- a/whisper_online_vac.py
+++ b/whisper_online_vac.py
@@ -165,9 +165,9 @@ if __name__ == "__main__":
 
             if end >= duration:
                 break
-            
+
             beg = end
-            
+
             if end + min_chunk > duration:
                 end = duration
             else: