Grau (música)

Graus em música tonal
I Tônica
II Supertônica
III Mediante
IV Subdominante
V Dominante
VI Sobredominante
VII Sensível

Na teoria musical, o grau musical representa a função e a importância de cada nota musical na escala musical diatônica e na tonalidade.[1][2] Determina o momento harmônico dentro de uma tonalidade, onde cada grau é representado por um número romano e recebe um nome próprio de acordo com sua função:[2]


Ordem Grau Nome Função
1º
I
Tônica repouso natural da tonalidade
2º
II
Supertônica grau acima da tônica
3º
III
Mediante grau intermediário entre a tônica e a dominante
4º
IV
Subdominante grau abaixo da dominante
5º
V
Dominante quinto grau a partir da tônica
6º
VI
Sobredominante grau intermediário (terça) entre a subdominante e a tônica da oitava superior
7º
VII
Sensível subtônica quando o intervalo relativo à tônica superior é de um tom (escala menor natural);

sensível quando o intervalo relativo à tônica superior é de um semitom (escala maior, escala menor harmônica e escala menor melódica)

{ \override Score.TimeSignature #'stencil = ##f #(set-global-staff-size 18) \set Score.proportionalNotationDuration = #(ly:make-moment 1/8) \relative c' { \clef treble \key c \major \time 9/1 c1 ^\markup { \translate #'(0.4 . 0) { "1" \hspace #9 "2" \hspace #9 "3" \hspace #9.2 "4" \hspace #9 "5" \hspace #8.8 "6" \hspace #7.5 "(♭7)" \hspace #8.3 "7" \hspace #9 "1" } } _\markup { \translate #'(-1.5 . 0) \small { "Tonic" \hspace #3.5 "Supertonic" \hspace #1.5 "Mediant" \hspace #1 "Subdominant" \hspace #0.3 "Dominant" \hspace #0.3 "Submediant" \hspace #1.5 "Subtonic" \hspace #0.3 "Leading tone" \hspace #3 "Tonic" } } d e f g a \override ParenthesesItem.padding = #1.5 \parenthesize bes b \time 1/1 c \bar "||" } }

Os acordes de cada tonalidade são construidos a partir dos graus e exercem funções específicas.

Triades

Ver também

Referências

  1. ↑ «Grau». Michaelis 
  2. ↑ a b Alves, Luciano (2004). Teoria musical : lições essenciais : sessenta e três lições com questionários, exercícios e pequenos solfejos. São Paulo: Irmãos Vitale. OCLC 817204492. Resumo divulgativo – WorldCat 
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