DESCRIPTION: http://www.gheffects.com/#section0 The Drifter from Greenhouse Effects is a fantastic sounding Analog Tremolo with a very cool feature set. You can choose from 7 different waveforms that take you from subtle pulses to full on Chopper and every where in between. There are 3 modes to choose from. The Save mode allows you to access 1 saved preset at any time. Drift Mode allows you to ramp up the speed when holding down the footswitch. Slide mode lets you increase the Depth by holding down the footswitch