Viva a Música em Você

Conceitos para a Improvisação

Claro que esse assunto é muito complexo, com muitas variações e possibilidades diversas; porque não se trata apenas de escalas e acordes mas também de sonoridades.

Mas com o estudo de hoje você vai entender como basicamente funciona a improvisação sobre centros tonais.

A ideia é trazer uma visão macro de como improvisar sobre centros tonais.

O assunto de hoje tem a ver com as escalas diatônicas e os campos harmônicos gerados por essas escalas; pois bem, temos quatro escalas diatônicas e consequentemente teremos quatro campos harmônicos gerados por essas quatro escalas.

Talvez você não tenha nenhum conhecimento de como funciona a prática da improvisação ou quem sabe você já tem um certo conhecimento mas dependendo do acorde ou movimento harmônico você já não sabe o que fazer…

Vamos ver então alguns exemplos práticos de movimentos muito comuns.

EXEMPLO 1:

1            2               3          4

| C7M | Gm7 C7 | F7M | C7M |

O centro tonal desta harmonia é Do maior (compassos 1, 3 e 4) e no compasso 2 temos uma cadência para resolver no F7M. Esta cadência é derivada do campo harmônico de Fa maior, II e V graus respectivamente.

Como praticar: No compasso 1 use a escala de Do maior , no compasso 2 use a escala de Fa maior e no compasso 3 e 4 retorne para escala de Do maior.

Campo Harmônico de Do Maior

I          II        III        IV       V      VI         VII

C7M | Dm7 | Em7 | F7M | G7 | Am7 | Bm7(b5)

Campo Harmônico de Fa Maior

I         II          III       IV         V      VI       VII

F7M | Gm7 | Am7 | Bb7M | C7 | Dm7 | Em7(b5)

EXEMPLO 2:

1             2         3          4

| C7M | F7M | Fm7 | C7M |

O centro tonal desta harmonia é Do maior (compassos 1, 2 e 4) e no compasso 3 temos um acorde de empréstimo modal resolvendo em C7M. O acorde de Fm7 é derivado do IV grau do campo de Do menor natural ou relativo.

Como praticar: No compasso 1, 2 e 4 use a escala de Do maior , e no compasso 3 use a escala de Do menor natural ou relativa e no compasso 4 retorne para escala de Do maior.

Campo Harmônico de Do Maior

I          II          III       IV       V      VI        VII

C7M | Dm7 | Em7 | F7M | G7 | Am7 | Bm7(b5)

Menor Natural/Relativo

I           II               III          IV       V         VI         VII

Cm7 | Dm7(b5) | Eb7M | Fm7 | Gm7 | Ab7M | Bb7

EXEMPLO 3:

1            2                       3           4

| C7M | Em7(b5) A7 | Dm7 | C7M |

O centro tonal desta harmonia é Do maior (compassos 1, 3 e 4) e no compasso 2 temos uma cadência para resolver no Dm7. Esta cadência é derivada do Campo harmônico de Re menor Harmônico, II e V graus respectivamente.

Como praticar: No compasso 1 use a escala de Do maior, no compasso 2 use a escala de Do menor harmônico e no compasso 3 e 4 retorne para escala de Do maior.

Campo Harmônico de Do Maior

I          II        III      IV       V      VI       VII

C7M | Dm7 | Em7 | F7M | G7 | Am7 | Bm7(b5)

Campo Harmônico de Re Menor Harmônico

I                 II                 III               IV        V         VI          VII

Dm(7M) | Em7(b5) |  F7M(#5) |  Gm7 |  A7  |  Bb7M  |  C#º   |

Conclusão:

A visão que eu quero passar aqui é que a maioria das músicas, independente do estilo musical, pop, rock, reggae, soul, clássica, jazz, etc… encontram-se dentro de um tom principal e eventualmente encontramos um ou mais acordes que não faz parte deste tom principal. O que fazer então para improvisar neste caso?

Basta você pesquisar na tabela de Campo Harmônico qual tom, esse ou esses acordes são provenientes e assim usar a escala deste tom! Simples assim!!!

Basicamente é assim que funciona a improvisação sobre centros tonais. No inicio, provavelmente você precisá de um pouco mais de tempo para pesquisar e encontrar o tom de origem desse ou desses acordes, mas com o tempo você vai perceber que existem muitos movimentos comuns e com a prática isso ficará cada vez mais automático.

Aqui você percebe então a importância do conhecimento dos fundamentos da harmonia em relação as quatro escalas diatônicas e os campos harmônicos gerados por essas escadas diatônicas.

Então fica a dica: você precisa ter um conhecimento dos fundamentos da harmonia, das escalas diatônicas e dos campos harmônicos gerados por essas escalas, para que você tenha um bom desenvolvimento na hora de improvisar.

Desejo a você bons estudos!

Viva a Música em Você!

13 de março de 2017

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