Roy Eldridge “St. Louis Blues”

Discographic Information

Instrument tp
Total Duration 34.6 s
Position in Track 00:07-00:42
Album Title Minor Jive
Label History - (Trumpets of Jericho)s (20.1973-HI)
Recording Date 1944-10-13
Line Up Roy Eldrige (tp, voc); Dave Mcrae (b); Humphrey Brannon (p); Napoleon Allen (g); Billy Taylor (b); Cozy Cole (dr)
Key G-maj
Signature 4/4
Groove/Feel SWING
Tonality Class BLUES
MusicBrainz ID e142b1ab-6645-4a11-a72d-9692f500b5f3
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Piano Roll



Download MIDI File


Chord changes of solo:

A1: ||G-   |G-   |D7   |D7   |D7   |D7   |G-   |G- D7 ||
A2: ||G-   |G-   |D7   |D7   |D7   |D7   |G- A7 |D7   ||
B1: ||G   |G   |G   |G7   |C7   |C7 D7 |G   |G   |D7   |A7 D7 |G   |D7   ||
B2: ||G   |G   |G   |G7   |C7   |C7 D7 |G   |G   |D7   |A7 D7 |G   |D7   ||
B3: ||G   |G   |G   |G7   |C7   |C7 D7 |G   |G   |D7   |A7 D7 |G   |G7   |G7   ||



Number of Notes 275  
Number of Bars 52 bars  
Number of Choruses 1  
Mean Tempo 361.3 (UP)  
Event Density 7.95 Notes/s  
Metrical Event Density 5.28 Notes/bar  
Median Swing Ratio 0.94:1 Ratio of longer to shorter eighth of beats with binary subdivision.
Metrical Centroid 4 Mean concentration of events in the bar, rounded and normalized to 4/4.
Syncopicity 23.6 % Share of syncopated notes.
Ambitus 62-83 (21) Min/max and range of MIDI pitches.
Extrema ratio 60.7 % 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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