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rhythm.py

@@ -85,6 +85,15 @@ class BassAnalyzer:
     Rhythm analysis from songs.
     Provides a beat amplitude signal from the audio signal.
 
+    Performs short-time Continuous Wavelet Transform on the signal,
+    with log-spaced frequencies.
+
+    This allows a fine-grained resolution of very low frequencies,
+    as opposed to an STFT where frequency resolution
+    would be limited by its window size.
+
+    Then, we perform Viterbi decoding to find the highest-power frequency at each window.
+
     References:
     * Cheng, Hart and Walker 2009: Time-frequency Analysis of Musical Rhythm
     * Smith 2000: A Multiresolution Time-Frequency Analysis And Interpretation of Musical Rhythm