12 Bar Blues 是最常見的blues form，每個單元有12個小節(bar)，以下是其Chord Sequence (E調)
E7 E7 E7 E7
A7 A7 E7 E7
B7 A7 E7 B7
這是一個十分十分常見(聽)的Blues，好多香港人會聽過。唔信聽下啦。
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此斷音樂總共有24小節，頭12小節相信你會在某場合聽過，跟住的是用blues scale jam的。如果你的Blues Scale 夠熟，你就可以自己玩。
Twelve-Bar Blues is the most common blues form. Each Unit has twelve bars. This is the chord sequence in E
E7 E7 E7 E7
A7 A7 E7 E7
B7 A7 E7 B7
I am sure you have heard of this sequence if you live in Hong Kong long enough. Don’t believe? Hit the play button and listen.
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繼上次練習完C Major Scale 及 C Minor Harmonic後，發現Blues Scale都好好玩，玩上左癮。用數字代表，Blues Scale 是 1 b3 4 b5 5 b7，那個b5就是Blues的特色。
聽說Blues的Chords都好有特點，無論是 I chord, IV chord, V chord…. 她們全都是dominant seventh chord。在音樂的詞匯內，Dominant解作第五音。 Dominant Seventh Chord 一般是第五Chord才會用的，例如，C調的民歌或一般的流行曲中我們會用這一些Chords C, Dm, Em, F, G7, Am。是第五Chord才”7″Chord的。但是，blues的音樂全部都會是 Dominant Seventh Chord。例如Twelve-bar blues 的 chord sequence 是 (C調)
C7 C7 C7 C7
F7 F7 G7 G7
G7 F7 C7 G7
今次錄了一段C調的riff。Backing chord 是 C7。
After practicing the five pattern of C major scale and C minor harmonic scale on my guitar, I am now playing with the Blues Scale. It’s so fun that I got addicted the scale. FYI, the formula of blues scale is 1 b3 4 b5 5 b7. Among the notes, b5 is the signature note of a blues scale.
You can tell easily that if a piece of music is blues: it’s full of “Dominant Seventh Chord”. In the context of music, “dominant” means the 5th. So, we use this chord if it’s a seventh Chord. Well, in blues, no matter it’s the 1st, 4th or 5th chord, it’s dominant seventh chord. eg. C7 F7 G7… for a twelve-bar blues in C, chord sequence would be
C7 C7 C7 C7
F7 F7 G7 G7
G7 F7 C7 G7
I record a riff. it’s C blues scale with a backing chord C7
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最近有朋友電郵了Youtube上有人用一枝吉他彈了J S Bach的 Air。唔怕炒冷飯，我又聽翻自己以前用電吉他及低音吉他錄了的Air。在此一登，方便大家聽。
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