J.J. Johnson “Elora”

Discographic Information

Instrument tb
Total Duration 38.9 s
Position in Track 01:21-02:00
Album Title Quadromania Jazz Edition, Sonny Stitt, One O’Clock Jump, CD 1
Label Membran Music Ltd. (22482444)
Recording Date 1949-10-17
Line Up Sonny Stitt (ts); J.J. Johnson (tb); John Lewis (p); Nelson Boyd (b); Max Roach (dr)
Key Bb-maj
Signature 4/4
Groove/Feel SWING
Tonality Class FUNCTIONAL
MusicBrainz ID 3ce11fa9-82d2-47c1-b588-9c44837db225
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Piano Roll



Download MIDI File


Chord changes of solo:

A1: ||C-7   |F7   |Bbj7 Ebj7 |D-7 Db7 |C-7 G7 |C-7 F7 |Bbj7   |D-7 Db7 ||
A2: ||C-7   |F7   |Bbj7 Ebj7 |D-7 Db7 |C-7 G7 |C-7 F7 |Bbj7   |F-7 Bb7 ||
B1: ||Ebj7   |Eb-7 Ab7 |Bb-7   |A-7 D7 |G-7   |C7   |C-7   |F7   ||
A3: ||C-7   |F7   |Bbj7 Ebj7 |D-7 Db7 |C-7 G7 |C-7 F7 |Bbj7   |D-7 Db7 ||
I1: ||C-7   ||



Number of Notes 140  
Number of Bars 32 bars  
Number of Choruses 1  
Mean Tempo 196.9 (UP)  
Event Density 3.6 Notes/s  
Metrical Event Density 4.37 Notes/bar  
Median Swing Ratio 1.52:1 Ratio of longer to shorter eighth of beats with binary subdivision.
Metrical Centroid 2 Mean concentration of events in the bar, rounded and normalized to 4/4.
Syncopicity 36.4 % Share of syncopated notes.
Ambitus 50-74 (24) Min/max and range of MIDI pitches.
Extrema ratio 36.4 % Share of notes with direction reversal (i.e, minima and maxima of pitch contour).

Extended Chordal Diatonic Pitch Class Histogram


Extended Chordal Diatonic Pitch Class is calculated in reference to the underlying chord.

Pitch Class Histogram


MIDI Pitch Histogram


Semitone Interval Histogram


Refined Contour Histogram


Also known as “fuzzy intervals” or interval classification. See here for definition of classes

Metrical Circle Map (N=48) Histogram


Metrical circle maps divides the bar duration into equal sized bins (48 in this case) and maps metrical positions to the corresponding bin. (Labels normalized to 4/4 measure).

Duration Class (Abs. and Rel.) Histogram


Relative duration classes are based on the duration of the beat. Absolute duration classes are based on 120 bpm. See here for a definition of classes.

Midlevel Analysis Main Types Histogram


Midlevel analysis is a qualitative annotation system of playing ideas, with nine different main categories, as defined in our paper

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