Charles Swiger wrote:
On Feb 23, 2015, at 11:57 PM, David Woolley <david@ex.djwhome.demon.invalid>
wrote:
On 23/02/15 21:23, William Unruh wrote:
manual corrections are probably good to 1 sec. to get 1 sec at 2ppm is
about 5 days per measurement or 10 days altogether.
It's a long time since I did this, but 200ms is more like it (might have been
100ms). You need digital clock that is, itself, synchronised, and you match
the rhythm of the ticks, then let one of them actually move the return key.
You have to really believe in setting accurate time not just be following some
instructions, to do this.
Threshold of perception for a new stimulus is around 80 - 100 ms. Untrained
reaction
time thus tends to be somewhat longer, right around the timeframes you've
mentioned.
However, if you time things with a rhythm you can get to ~50 ms or better, and
subconscious muscle memory for practiced skills can involve timing on the order
of ~5 - 10 ms. (Think of a ping-pong player who understands spin and can target
the corners of the table reliably, or a pinball player who can trap the ball on
the flipper and then make reliable controlled shots.)
The best example is accomplished drummers, they work in the low ms
range, but even Ringo would vary his teaming to emphasize various parts
of a song:
http://musicmachinery.com/2009/03/02/in-search-of-the-click-track/
Terje
--
- <Terje.Mathisen at tmsw.no>
"almost all programming can be viewed as an exercise in caching"
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