Mutable Instruments Peaks is provides four different essential modulation/transient functions in a small package. Divided into two identical sections, Peaks provides any combinations of LFO (low frequency oscillators), LFO w/ Tap Tempo functions, and ADSR / AR envelope functions. Additionally Peaks provides a drum simulator mode that can synthesize kick, snare, and hi hat sounds digitally modeled from the famous Roland Tr-808.