During the 1920s, jazz was beginning to sweep across America, becoming especially popular in New York. The status of African Americans was elevated due to their distinct music becoming increasingly popular, and jazz music evolved into an integral part of American popular culture. The original music of the Africans that had begun in New Orleans had diversified and now appealed to people from every social group of society. One man who helped the progression of jazz through the 1920s was Louis Armstrong, originally a part of Joe “King” Oliver’s jazz band; he broke away from his mentor and moved to New York, creating a new genre of jazz improvisation.
The availability of recordings helped the growing popularity of jazz due to new technology, and this helped the 1920s become known as the Golden Age of jazz in New York. One jazz composition of the 1920s was Louis Armstrong’s performance of West End Blues. This piece begins with an introduction by the trumpet lasting 10 bars, showing the incompleteness, which creates the antecedent that will lead to the rest of the song. Then, beginning with a few descending straight crotchet notes, rhythmic deviations appear, such as the multiple triplets used in the rising sequence a few beats later. This signals that this music is indeed African influenced as there is evident syncopation. The triplets begin ascending chromatically through E, F and F# then triadically through a Cm chord with one leap down followed by two leas up; G down to Eb up to G up to C. This continues into the second beat of the next phase, where it rests on a dotted minimum of C.
Armstrong develops the four quaver notes he first uses throughout this opening cadenza and experiments with dynamics as, on occasion, the trumpet also plays staccato. At the end of each phrase of the opening introduction, each finishing note is held for longer, giving a slight rubato effect to the music and contrasting against the fast triplet rhythm just heard; this contrast gives interesting listening and shows Armstrong’s innovative playing. The second phase of the introduction is a descending figure, again introducing contrast into the music. This melodic descent provides cohesion into the first section of the music, both in the lower register and at a slower pace, aided by the modulation to Eb minor in bar 6. This introduction clearly shows that this style of music is based mainly on improvisational technique, a feature that is evident throughout this piece.
The general form of the song consists of a repeated A section, each with alterations to instrumentation and the melody. Each section, however, is similar in terms of melodic basis, all using the Eb major blues scale to base the melody; Eb. Gb, Ab, Bbb, Bb, Db; and each using the same deviation of the 12 bar blues. This consists of I, I, I, I7, IV, IV, I, I, V, V, I, V; the V is an alteration to the original 12 bar blues, which would finish on the tonic. Yet, this dominant chord allows the music to feel circular as it returns to the tonic at the next playing of the 12 bar blues. This circular motion allows each section to expand upon themes/motifs that the previous section plays. Each new A section is given to a different solo instrument, showing this era as the striving virtuoso musicians within jazz. A1 is the trumpet solo section, where it begins with an anacrusis for Armstrong to establish a new tempo amongst the other performers. This begins with the rising motif found in the first bar; F# quaver to a G semiquaver to Bb semibreve tied to a crotchet.
The first note of an F# is the minor 3rd in this key’s blue scale, immediately establishing the music as a blues-influenced piece. This then moves chromatically to the G, which moves effectively into the Bb chord note that is next played; this semitone step creates a gentle movement to the Bb, which is the fifth of the Eb chord that is being played at this point. This is the basis for the piece as each instrument manipulates this pattern and plays with the melody surrounding it as each musician improvises around this original idea, such as the later trumpet solo, which plays this progression but extends the Bb. Underneath each solo instrument, the piano underpins the music by playing the 12 bar harmonic chords on a straight crotchet rhythm, contrasting against the melody’s interesting and often syncopated rhythms.
Section A2 is given to the trombone soloist and the accompaniment now also includes a percussive instrument which sounds similar to horse hooves, adding a swung rhythm to the music giving interesting rhythmic counterpoint, and this also adds to the slightly lethargic feel that the music has to go along with the “blues” feel. The trombone also adds an interesting new timbre to the music as it uses multiple slides and sounds slightly muted. Moving to section A3 and now the soloist is the vocalist Louis Armstrong; instead of using lyrics, however, he uses his voice like an instrument and ‘scats,’ meaning his voice is still an instrument, and he can still be considered as a virtuoso musician as he improvises throughout. This improvisation is still based around the 12-bar blues progression and the Eb blues scale; being able to improvise with his voice in this way shows the beauty of Armstrong’s melodies, his phrasing and his ability to find melodies that compliment the clarinet.
The vocals are accompanied by a clarinet in this A3 section to thicken the texture of the deviated 12-bar blues progression and give a new fuller timbre to the music to show progression. Section A4 is the only section that deviates from the 12-bar blues progression used up to this point, the piano is the soloist at this point, so it must deviate from the progression it has been playing. However, it still begins on Eb to retain the key centre. Still, in the first bar, it moves to Eb over Db, then in bar 2 Eb over C Bb7, giving a descending bass line as the piano then moves to Eb over Bb; A over Ab, then a straight movement from Ab to A to Bb, contrasting with an ascent to show the music is still developing. Armstrong again experiments with dynamics at this point, using a mixture of legato and staccato to contrast against one another and keep the music interesting and innovative.
In section A5, the soloist is again the trumpet, but this time the melody is entirely different to that of section A1 as this time it begins with a note held for a full 4 bars; this long note creates tension and excitement as this is now the last section of the movement and any musician able to hold a note that long on a trumpet is a truly skilled and experienced performer. This is followed by a descending four-note semiquaver motif consisting of all of the flats used thus far; Bb, Ab, Gb and Eb. At this point, Armstrong experiments with inflection as each playing of this motif varies; the first time, it is played straight, the second time, the first note is delayed. This pulls the tempo back slightly, yet this is then contrasted against with the third playing, which is straight again, then the fourth playing sees the first note delayed again.
The solo instrument changes differently from the previous sections, as, at bar 9, the piano again takes over for a short period before the trumpet returns at bar 12. This gives a conversation-like effect as if the musicians are discussing through their instruments that the end has come. Finally, at bar 12, the trumpet returns and finishes the song creating a full circle. This song is mainly based upon the same 12-bar blues progression that is stated at the beginning in section A1; from there, soloists can shine in their own sections that are improvised. This music was the beginning of the virtuoso musicians and led the way for improvisational yet scored music.