RE: Short loop fades more quickly than long loop with same feedback setting

["Jeff Larson" <jeff.larson@sailpoint.com>]

From: Warren Sirota
> The points seem to be tied to specific looping implementations. 

There are two fundamental concepts, which lacking any formal
definition we call "feedback" and "fade".  The concepts are
implemented by many loopers, though the names used are not always the
same.

Fading is usually taken to mean manipulation of the output level,
either gradually lowering it to zero or raising it from zero.  This
does not modify the loop, so you can always "unfade" by moving
the level in the opposite direction.

Feedback is a destructive operation that involves re-recording the
loop at a percentage of its previous level.  The usual examples of
this are the EDP or a tape delay with a special erase/record head.
You cannot "unfeedback" unless the looper supports multi-layer undo.

The formulas apply to feedback, not fading.  This originated from a
discussion on fading and how you could accomplish something similar to
fading with feedback, but that they have different characteristics.
They should be relevant for the EDP, Looperlative, or any other looper
that supports feedback with this definition.

Jeff