Update sound_detector.py by adding comments

api/sound_detector.py

@@ -1,13 +1,18 @@
 # Importing librosa.
 import librosa
 
+# find_tempo takes an audio file as argument and returns a formatted string that indicates the tempo of that audio file.
 def find_tempo(filename):
+    # librosa.load is used to load the audio file into memory as a waveform and a sample rate.
     y, sr = librosa.load(filename)
+    # librosa.beat.beat_track is used to calculate the tempo of the audio file based on its beat frames, which are stored in beat_frames.
     tempo, beat_frames = librosa.beat.beat_track(y=y, sr=sr)
     file_tempo = format_tempo(tempo)
     return f'Your audio file tempo is of {file_tempo} bpm.'
 
-
+# format_tempo takes a floating-point number and returns a string representation of that number with two decimal places.
 def format_tempo(float):
     float = "{:.2f}".format(float)
-    return float
+    return float
+
+