switching at zero cross/noiseless switching

Martin Czech martin.czech at intermetall.de
Thu Nov 11 08:55:31 CET 1999


:::But a much better approach is to ignore the zero crossing and simply
:::delay switching from input A to input B, waiting until the two inputs
:::are equal.
:::

I have experienced that a continuous signal like this gives no pop, but
a click.  The first derivative or higher order derivatives are likely
to be not continuous, ie. the signal is not "smooth".

This is the same problem in denoising software.  If you try to eliminate
a vinyl crack on an audio recording by hand drawing, you get less pop ,
but more click. Automatic decraclers try to interpolate new values for
the cracked region by using a difference equation, ie.  "derivatives"
are considered.

m.c.




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