Korpa 
1) Total (true) bypass with an LED effect-on indicator.
2) "Intelligent" envelope detector circuitry that
allows accurate, rapid staccato playing when the
strings are muted between notes.
When this is done the envelope (signal level controlled)
sweep automatically resets and begins again on the
next note or chord played.
3) The ability to combine envelope controlled and LFO
(internal low frequency oscillator) sweep for a wide range
of effects from full envelope control to full LFO.
4) Quiet operation with companding noise
reduction circuitry.
