sorry hc - hit the wrong button.
On 8/15/06, dafydd hughes dafydd@sideshowmedia.ca wrote:
Is it possible to chop off the smallest bit or two of the sensor output i.e. reduce the resolution? I remember using a basic stamp program that did that for midi data.
On 8/15/06, Hans-Christoph Steiner hans@eds.org wrote:
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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