Pop, Pop Pop

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Pop, Pop!Pop Rock Music Structure Analysis
from Audio signals

• Yu Shiu
• ISE 575
• Apr, 2005

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Pop Rock Music Structure

• Chorus
• the part of the song lyrically that tends to be
  repeated.
• Everybody, sing along" part
• Verse
• Say story part
• Lyrics not repeated
• Others
• Intro, bridge, outro, variation of verse,
  instrument solo

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Characteristics of Pop Rock Songs

• Relatively strong beat
• 4/4 Time signature
• Some exceptions
• 3/4 in Piano Man of Billy Joel
• 7/8 in Money of Pink Floyd
• Verse Chorus combination
• AABA
• ABAB
• ABABCB
• ABABCAB
• AABABB

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Goal of My Final Project

• Present the pop rock song in a similarity
  matrix
• Repetition part could be easily seen
• Using musical tempo

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System Architecture
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Tempo EstimationScheriers method
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Phase of Beats Measures
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Pitch Class Profile (PCP)

• Used in chord and key detection
• PCP in 1/16 notes are used to represent the
  time-varying contents
• Easily extracted from audio signals

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Similarity Matrix

• Similarity between each measure pair
• Adjacent points in similarity matrix have 50
  overlap
• Half a measure overlap

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Similarity MatrixU2s Vertigo
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Similarity Matrix of U2s Vertigo70BPM
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NirvanaSmells Like Teen Spirit
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PixiesWave of Mutilation
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10,000 maniacsThese are days
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Beatles?