On 12/12/2013 03:26 PM, Stefan Schreiber wrote:
Paul Hodges wrote:
--On 12 December 2013 01:41 +0000 Stefan Schreiber
<st...@mail.telepac.pt> wrote:
You won't need any "base station" for HT, by now!
If you have no fixed reference, how do you cope?
GPS, relative GPS?
i doubt it would be precise enough. the subject is not moving, after all.
Do you add a compass
(and have a command to set the direction of front), or do you allow the
front to drift back into place when there is no movement?
how good are these built-in compasses? i still have a very dumb
smartphone...
Gyroscope, accelerometer...
but those _will_ accumulate errors. doing dead reckoning with just a
gyro and accelerometer requires double integration and is, ahem, prone
to difficulties. check out pynchon's "gravity's rainbow" for a novel
approach to the problem ;)
executive summary: if you are going to do it for less than a few
seconds, you will have to choose _very_ big targets.
the situation is a bit less dire if all you care for is heading, but you
will need a reference every once in a while to re-calibrate your
reckoning, or else default to "in the absence of head movement, drift
back to due north orientation", like paul seid.
which can be irritating and, in the case of "physical" soundscapes,
disorienting.
--
Jörn Nettingsmeier
Lortzingstr. 11, 45128 Essen, Tel. +49 177 7937487
Meister für Veranstaltungstechnik (Bühne/Studio)
Tonmeister VDT
http://stackingdwarves.net
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