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Topic: disinventing the wheel
013 The zig-zag isotempo
Published: Jun.29.2005 @ 3:20 pm | Print | Email | Comment

IOI around 400ms was already described as the first fully-fledged "beat specific" isotempo, as it was descibed as corresponding to the "first sustainable rate of attention-shift" and the first pace that we can imagine as a continuous row of thesis pulsations (like a 1/X bar).

No psychology textbook helped me disentangle the reasons why our brain processes IOI 400ms (around) in this peculiar way – so I had to devise my own experiments.
Whenever I felt unsure about producing with accuracy a IOI around 400ms isotempo (that used to happen long ago, rest assured), I submitted it to the zig-zag test:
"In order not to imply in the experiment ocular movements, we shall imagine mentally any similar zig-zag trying then to pass from one point to another (A, B, C, D, E, F, G, H etc.) is such a way that consecutive stops do not create, from a temporal point of view, subjective thesis-arsis relationships (nor binary neither compound) as we should perceive any stop as experientially equal to any other stop. Moreover, we shall make sure that each stop implies a thorough change of the object of consciousness (i.e. a complete transfer of attention). Upon these conditions, the next step is to find out (and measure), from a psychophysical point of view, which would be the maximum rate of passing from one point in the zig-zag to another. The result should indicate an IOI value situated around 420-430ms. The absolute memory (i.e. skipping the experiment just described, for that implies relational memory) for this isochronous tempo can be achieved by practice."
(Quoted from my article A Matter of Perspective)
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