It does say a 'general' rule, so not absolute. By the same token, deploying a rake is also not absolute or mandatory. With octaves the "index=low, middle=high" idea is rational because it exploits with finger length differences. The really great thing with Ed's book is that it teaches you solid stuff whilst also presenting opportunities for you to think, try out and discover ideas for yourself.Looking for some technique clarification. On page 32 just above octave blues, its notes that when changing strings to lead with the middle finger when going higher and the index when going lower but doesn't this run counter to the rake, or at least in some cases? Like if i go to the the A string and lead with middle and the next note is back on the E string which finger do i use? the rake says middle and the note on page 32 would be index
Take another simple octave-based line like this:
Here the ideas of "index=low, middle=high" and "AP up; Rake down" start to clash if you try to apply them both in absolute terms, especially if you start to push the tempo*. Even in the book exercise (#62) it is impossible to apply every 'rule' in absolute terms all of the time. The great thing with Ed's book is that it teaches you solid stuff but it also creates opportunities for you to think, try out and discover ideas for yourself.
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* The key to playing at speed is to practice good accurate technique very slowly. Something like my example above could easily be played at 120 bpm with just one finger or even just the thumb. But double it up like this:
and even at modest 80 bpm it really needs more than one finger. So why not practice/play the first one with a right-hand that is also compatible with the second. Scaling to tempo then becomes a case of "the same, but faster", rather than having to think about playing something differently just because it is faster.