The Global Controls section of Harmor's GUI controls a variety of effects more related to the performance of notes rather than the timbre of the sound. Articulation of notes is strongly effected by the legato and strum controls. The only timbre controls within the Global Controls is the A/B switch. This feature controls two independent parts that can be mixed and modulated separately. The depth of the final output is much deeper and complex due to these factors controlling more characteristics of the sound. Windows 7 and 8, Vista, XP (SP2) - (32 and 64 bit OS).2 GHz AMD or Intel Pentium 3 compatible CPU with full SSE1 support.