So how did you manage the musical summary of the 12 bar blues with respect to Tonic Key - do (4 bars), Sub Dominant - fa (2 bars), Tonic - do (2 bars), Dominant + flattened 7th - sol (2 bars), Tonic - do (2 bars) = 12 bars in all. If you play an instrument especially piano or guitar then mostly easily. However if you are a listener it is very satisfying if you can pick up on the change of sounds from Tonic to Sub-Dominant, back to Tonic, then to the Dominant 7th which shouts at you to return to Tonic and it does. Listen to Sidney Bechet playing St Louis Blues and try to pick up on the orchestras change of sound. https://youtube/watch?v=XzG3vllEwyg. Watch the timer and you will find that the 12 bar sequence begins at 0.05 - 0.10 (Tonic Key for 4 bars) then 0.10 - 0.14 (Sub-Dominant for 4 bars), then 0.14 - 0.16 (Tonic for 2 bars), then 0.16 - 018 (Dominant 7th for 2 bars), then finally 0.18 - 0.20 (Tonic again for 2 bars). The 12 bar sequence is then repeated over and over again, often different instruments playing variations on the different sounds (usually called chords). Practise listening to Blues and try to identify when the sound pitch changes from Tonic to Sub-Dominant, back to Tonic then to Dominant 7th and finally back to Tonic. It is so much more satisfying when you can recognize these elementary pitch changes. Most very popular jazz songs follow a different structure known as AABA (4 x 8 bars). Listen to Fly Me To The Moon https://youtube/watch?v=aSPbwXUq9vM and you will easily follow the AABA sequence and some intricate improvisatory interludes by Ol Blue Eyes. Good listening. More complex sequences later.
Posted on: Tue, 21 Oct 2014 11:27:49 +0000
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