27 de setembro de 2007

Jazz

O jazz surgiu no período entre 1890 e 1910 em Nova Orleans.
"Improvisation exists in almost all music - whilst the term is most frequently associated with melodic improvisation as found in jazz, spontaneous real time variation in performance of tempo and dynamics within a classical performance may also be considered as improvisation.Musical improvisation is the spontaneous creative process of making music while it is being performed.

To use a linguistic analogy, improvisation is like speaking or having a conversation as opposed to reciting a written text.Most improvisation is structured, with certain predetermined structures shaping the improvisation, such as the form of a song." (from Wikipedia)
Improvising is composing in real-time. Here are some considerations and thoughts about musical improvisation analysis.
At the end of this page there are important ad helpful tips about music improvisation.
Harmonic features about musical improvisation:
there are different ways in improvising more or less similar to the harmony of the song on which it is made.
In pop and classical music (Mozart, Chopin, and many other ones also improvised in the days going by musicians improvise inside harmony, chords and tonality.
Improvising in blues is freer, it is based on the scale or blues tonality, but much more using chromatics and ornaments.
In jazz solos there are different degrees of freedom, according to the Jazz styles.
In Traditional Jazz (Dixieland) improvisation is based above all on the notes of chords and tonalities.Swing : it is based on their chords and tonalities using major, minor, diminished, pentatonic, blues scales.
be-bop - It is based on a frequent use of non chordal notes (9°,11°,13 °), chromatics, harmonics substitutions and particulars (whole tone, diminished-whole tone scales)
modal Jazz - It is based on one or two modes (ancient scales, not major o minor but for example Doric, Phrygian...)
free-Jazz - It is based on extempore interaction between musicians, often following datum points. In this style improvising becomes completely free
Also in funky music there is a frequent use of notes out of chord and tonality, but without disturbing harmony.
In ethnic music improvising is based on pentatonic scales or typical modes of a particular region (for example Arabian or Indian music)
In rock solos are usually inside harmony, change of chords and tonalities, and often follow pentatonic and blues scales.

Jan Kubelik plays "Zephyr" by Hubay