TC-Helicon Play Electric - Reference Manual - Manual (Page 37)

Setup button/section
Play Electric – Reference manual (2014-07-16) 35
In this mode, available loop time is doubled to
30 seconds.
Loop Feedback parameter
Use the Loop Feedback parameter to control the
amount of loop record feedback.
When recording a loop with multiple passes (or
parts), the signal from the first loop pass is add-
ed to the next, and so on.
If all of these passes were put together at full
(100 %) volume, the loop you are working on
would get louder and louder and LOUDER, so
you would end up with a distorted output signal.
The purpose of the Loop Feedback parameter is
to prevent this volume increase from happening.
When you record a new pass to the existing loop,
it is recorded at 100 % volume, but the existing
loop is blended with it at the Loop feedback set-
ting.
The calculation works like this:
Input + (Loop x Loop Feedback) = Loop output
I.e. input + (Loop x 90%) = output
(Run away! Scary math!)
Most users find the default setting of 98% works
well, but you may find a different setting that
works best for you.