[PD] is there a kalman filter for pd? (if not I could probably provide one, if I make it :) )

katja katjavetter at gmail.com
Fri Dec 14 11:38:52 CET 2012

Patrick, the barometer sensor samplerate is ~50 Hz and I did the
butterworth filter with regular Pd objects, not as external (see

In the Pd patch I modeled sensor noise (resolution 3 Pascal according
to datasheet) and pressure gradient, simulating vertical speed through
the air. The aim is to get 0.1 m/s accuracy in vertical speed reading.
Theoretically, this would be almost possible with the butterworth. But
our real sensor has much more noise than 3 Pascal resolution.
Therefore I'm still interested in better filters.


On Wed, Dec 12, 2012 at 6:29 PM, patrick <puredata at 11h11.com> wrote:
> hi Katja,
> did you ported this filter:
> https://github.com/lebipbip/le-BipBip/blob/master/filter.c
> to an pd external? if yes could you share it? not sure if it would help my
> situation (noisy accelerometer 1 axis), but i would like to give it a shot.
> thx
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