[sdiy] Wanted: non mathematical description of the function of RC-filters

[cheater00 .]

On Thu, Aug 8, 2013 at 10:01 PM,  <rsdio at sounds.wa.com> wrote:
> I like the second example, but the first is problematic. The implication
> when an analogy is made between a sieve and an audio filter is that there is
> a binary relationship. With a sieve, either a particle fits through the
> holes or it doesn't. With an audio filter, it's not so black and white.
> Filters have a slope, and this allows frequencies from input to appear on
> the output at reduced amplitudes.
>
> The misconception that filters completely stop all frequencies beyond their
> cutoff is such an issue that I wrote an article about it a while back. The
> article does nothing to explain the electronics of RC filters, but it might
> be interesting reading now that I've brought it up:
>
> http://www.plasmodium.net/music/eq-filters-and-frequency-responses-are-not-perfect/
>
> Brian Willoughby
> Sound Consulting


Change the sieve to a centrifuge then.

D.