Musical similarity is a certain similarity

Similarity

-Specific definitions:Different fields provide differing definitions of similarity:-In computer science:* string metric, aka string similarity* semantic similarity in computational linguistics-In other fields:...

 between two or more musical fragments. If these fragments are from one musical piece a musical similarity implies a repetition

Repetition (music)

Repetition is important in music, where sounds or sequences are often repeated. One often stated idea is that repetition should be in balance with the initial statements and variations in a piece. It may be called restatement, such as the restatement of a theme...

 of the first occurring fragment. As well, eventually, the similarity does not occur by direct repetition, but by presenting in two (or more) set of relations, some common values or patterns. Then musical similarity can be classified at least in the following parameters:

Pitched parameters

• Pitch
  Pitch (music)
  Pitch is an auditory perceptual property that allows the ordering of sounds on a frequency-related scale.Pitches are compared as "higher" and "lower" in the sense associated with musical melodies,...
  
   interval similarity
• Melodic
  Melody
  A melody , also tune, voice, or line, is a linear succession of musical tones which is perceived as a single entity...
  
   similarity
• Modulation
  Modulation (music)
  In music, modulation is most commonly the act or process of changing from one key to another. This may or may not be accompanied by a change in key signature. Modulations articulate or create the structure or form of many pieces, as well as add interest...
  
   pattern similarity
• Timbral
  Timbre
  In music, timbre is the quality of a musical note or sound or tone that distinguishes different types of sound production, such as voices and musical instruments, such as string instruments, wind instruments, and percussion instruments. The physical characteristics of sound that determine the...
  
   similarity

Non-pitched parameters

• Metrical
  Meter (music)
  Meter or metre is a term that music has inherited from the rhythmic element of poetry where it means the number of lines in a verse, the number of syllables in each line and the arrangement of those syllables as long or short, accented or unaccented...
  
   structure similarity
• Rhythm
  Rhythm
  Rhythm may be generally defined as a "movement marked by the regulated succession of strong and weak elements, or of opposite or different conditions." This general meaning of regular recurrence or pattern in time may be applied to a wide variety of cyclical natural phenomena having a periodicity or...
  
  ic pattern similarity
• Section
  Section (music)
  In music, a section is "a complete, but not independent musical idea". Types of sections include the introduction or intro, exposition, recapitulation, verse, chorus or refrain, conclusion, coda or outro, fadeout, bridge or interlude...
  
   structure similarity

Semiotic parameters

• Modality
  Modality (semiotics)
  In semiotics, a modality is a particular way in which the information is to be encoded for presentation to humans, i.e. to the type of sign and to the status of reality ascribed to or claimed by a sign, text or genre. It is more closely associated with the semiotics of Charles Peirce than Saussure...
  
   structure similarity
• Extension
  Extension (semantics)
  In any of several studies that treat the use of signs - for example, in linguistics, logic, mathematics, semantics, and semiotics - the extension of a concept, idea, or sign consists of the things to which it applies, in contrast with its comprehension or intension, which consists very roughly of...
  
  al similarity
• Intension
  Intension
  In linguistics, logic, philosophy, and other fields, an intension is any property or quality connoted by a word, phrase or other symbol. In the case of a word, it is often implied by the word's definition...
  
  al similarity

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