MEL-IRIS: An Online Tool for Audio Analysis and Music Indexing

Figure 2

(a) The interval F#-G does not add any chroma (𝜒=𝜒^∘) to the musical piece, which is written in G-Major (𝜒^∘=1.2857). (b) The same interval adds more chroma (𝜒>𝜒^∘) to the musical piece, which is written in C-Major (𝜒^∘=1.2857).

(a)

(b)