Correct missing import

sonogram.py

@@ -1,6 +1,7 @@
 import sonogram_utility as su
 from pyannote.audio import Pipeline
 import pickle
+import torch
 
 class Sonogram():
 
@@ -27,7 +28,7 @@ class Sonogram():
             if not self.isGPU:
                 print(f"GPU is not available")
             self.device = torch.device("cuda" if self.isGPU else "cpu")
-            print(f"Using {device} instead.")
+            print(f"Using {self.device} instead.")
     
         self.pipeline = Pipeline.from_pretrained("pyannote/speaker-diarization-3.1")
         self.pipeline.to(self.device)