Beat and Tempo Tracking Quiz

Answers and explanations appear as you take the quiz.

1. What is the difference between tempo tracking and beat tracking?
   • Tempo estimates overall speed (BPM); beat tracking finds each beat's timestamp
   • They are the same thing
   • Tempo finds the lyrics; beat tracking finds the key
   • Beat tracking measures volume; tempo measures pitch
2. What is an onset strength envelope used for?
   • Encrypting the audio
   • Highlighting moments where musical energy increases
   • Translating the song to another language
   • Removing the vocals
3. What is the 'octave error' in tempo estimation?
   • Detecting the wrong musical key
   • Playing the song an octave higher
   • Locking onto half or double the true tempo
   • Missing the first beat of every bar
4. Which technique is commonly used to estimate periodicity for tempo?
   • Spell checking
   • Image segmentation
   • Base64 encoding
   • Autocorrelation
5. Why is dynamic programming used in classic beat trackers?
   • To find a beat sequence that is evenly spaced and aligned with onsets
   • To compress the file
   • To generate album art
   • To detect the singer's gender
6. What does a 'downbeat' refer to?
   • The quietest note in a song
   • The first beat of a measure or bar
   • A beat played on a drum machine
   • A beat that is off-tempo
7. Which model components does the BeatNet paper combine for online beat, downbeat, and meter tracking?
   • A text tokenizer and a language-model decoder
   • A spectrogram hash table and vector search
   • A convolutional-recurrent neural network and particle filtering
   • A decision tree and a k-means clusterer
8. How are musical onsets different from beats in a beat-tracking system?
   • Every onset is necessarily a beat
   • Beats only occur when a new instrument enters
   • Onsets describe average tempo in BPM
   • Onsets mark sound attacks, while beats mark the underlying metrical pulse and need not coincide with every onset