Update sonogram_utility.py

sonogram_utility.py

@@ -248,7 +248,7 @@ def annotationToDataFrame(myAnnotation):
     for currSpeaker in myAnnotation.labels():
         if currSpeaker not in speakerDict.keys():
             speakerDict[currSpeaker] = []
-        for currSegment in myAnnotation.subset([speaker]).itersegments():
+        for currSegment in myAnnotation.subset([currSpeaker]).itersegments():
             speakerDict[currSpeaker].append(currSegment)
 
     timeSummary = {}