On Aug 15, 2006, at 7:54 PM, Cesare Marilungo wrote:
derek holzer wrote:
If all the IRQ stuff that was just suggested doesn't make you
happy, try this:[sensor input] | [pack 0 n] (where 'n' = the time in miliseconds you would like
your signal smoothed by) | [line] (or [line~] if you are using it to control an audio
signal] | [expr x] (where 'x' is some math to get the numbers where you
need them) | [whatever happens next]This adds latency and results are still (albeit less) jumpy.
To smooth out a signal coming from a control (especially for midi
ctls) i use:[input] | [sig~] | [lop~ n] (try a n value between 20 and 50) | [whatever]
Found the trick above posted on this list by somebody else.
You can also achieve this without the added load of audio objects.
[iir] and [lop] in mapping provide filters in the message domain.
.hc
c.
You could also explore [pow] or some of the other maths to do the
job of [expr] if you aren't a math whiz. The [line] object is
really handy to smooth out a jumpy signal. Try different values of
interpolation (i.e. the 'n' in the [pack] object), depending on
how fast you need a response versus how jumpy the input is. There
used to be a [speedlim] object that also did this nicely and was
really designed for sensor input, but the maintainer (Johannes
Taelmann) doesn't seem to be maintaining it (and has dropped off
the face of the Earth as far as PD in concerned unfortunately!).d.
David Powers wrote:
Maybe I don't know what I'm talking about, but couldn't you just
take the average value over some time period?~David
On 8/15/06, *patrick* < patrick@11h11.com
mailto:patrick@11h11.com> wrote:hi all, i've done a project using the MULTIO of mamalala and HID tocapture the output of my sensors (infra-red, tilt and such). sadly the
values are really jittering and i have a logarithm sensor too.i know that each case is unique, but maybe there's some rules to stabilize the fluctuation and correct the curve (logarithm)??? thanks for sharing any knowledge on this! pat-- www.cesaremarilungo.com
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