GForce Oberheim OB-1 (ESD); Synthesizer-Plugin;officially endorsed emulation of the 1978 Oberheim OB-1 with extended features; classic Oberheim 2-pole or 4-pole filter with screeching resonance; mono unison, mono legato and poly mode with up to 16 voices; unique waveshaping possibilities; augmented with vast modulation options via XLFO and XADSR; four programmable macros; programmable velocity responses and poly aftertouch; including an arpeggiator and a sequencer; with built-in chorus, delay, reverb and an additional highpass filter; scalable user interface; over 300 presets