Update README.md

README.md

@@ -42,7 +42,7 @@ Visualize the results of WhisperSeg:
 ```python
 from audio_utils import SpecViewer
 spec_viewer = SpecViewer()
-spec_viewer.visualize( audio = audio, sr = sr, min_frequency= min_frequency, prediction = prediction,
+spec_viewer.visualize( audio = audio, sr = sr, min_frequency= 0, prediction = prediction,
                        window_size=8, precision_bits=1 
                      )
 ```