31 de outubro de 2017

Improvisation



Brad Mehldau fotografado por Michael Wilson




… In a strictly formal sense, the music on this record sits well within the “theme and variations” model that has long been the dominant approach of small ensembles in jazz. Defined succinctly, it goes as follows: The theme is stated first, often reffered to as the material, whose structure is repeated indefinitely – like in a classical theme and variations setting – until the soloing is concluded. Generally, the theme is reprised at the end of the composition. Period.

That is an admittedly provisional definition of what takes place very often in jazz, but the approach itself has a provisional logic. In one sense, the beginning thematic material has a merely temporary role because it doesn’t develop further. The improvisation that ensues will usually constitute the bulk of the performance. On the other hand, the improvisation is bound to the initial thematic structure for its duration, repeating it over and over again…

… So, the theme and variations approach allows the soloist to correspond with the rest of the band. The efficacy of the approach lies in its expediency: It provides a quick and clear way for the soloist to improvise with a high degree of spontaneity. The harmonic material that underpins the solo, though, with its tension and resolution, will provide a narrative backdrop – a place of origin and a destination. A balance is reached between something fixed and something open-ended. For me, this technique has always been rewarding as an improviser, but can be confining as a composer.

It strongly implies a specific relationship betwen harmony and melody. In much of tonal music, the union of those two elements is an ideal. Harmony – simply two or more tones sounding in unison – is not so much an end in itself; rather, it is the outcome of two or more melodies taking place simultaneously. Melody has primacy always, and the relationship between two or more melodies creates harmony, which is secondary…

Brad Mehldau (in "House on Hill" liner notes )

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