Add device change methods

sonogram.py

@@ -219,4 +219,12 @@ class Sonogram():
     def __call__(self,audioPath):
         annotation, totalTimeInSeconds, waveform, sampleRate = self.processFile(audioPath)
 
-        return annotation, totalTimeInSeconds, waveform, sampleRate
+        return annotation, totalTimeInSeconds, waveform, sampleRate
+
+    def toDevice():
+        self.pipeline.to(self.device)
+        print(f"Sonogram moved to {self.device}")
+
+    def toCPU():
+        self.pipeline.to('cpu')
+        print(f"Sonogram moved to CPU")