[LAU] Open Source MIDI control surface

[Fons Adriaensen]

On Tue, Dec 02, 2008 at 04:41:10PM -0500, nescivi wrote:

> > well, 10 bit is ok, but i would prefer a more accurate resolution.
> 
> That's not what I am getting at.
> If your sensor's analog output value has less than 0.097656 % (1/1024 * 100%) 
> noise, then, yes, you need a more accurate ADC. Otherwise there is no point.

Depends on the noise bandwidth and sample rate. 
A simple 2nd order, critically damped LPF can
do wonders. If you buffer the sensor with an
opamp, this takes just two resistors and two
condensors. I'd use it anyway.

Ciao,

-- 
FA

Laboratorio di Acustica ed Elettroacustica
Parma, Italia

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