 Each sample could be modulated by any number of modulation sources, including velocity, polyphonic aftertouch, LFOs, envelopes, footpedals, or combinations of the two patch-select buttons on the left hand side of the keyboard.These patch-select buttons (an Ensoniq trademark) allowed the player to instantly recall during performance any one of four pre-programmed combinations of the eight layers to be sounded.In its default format, the ASR-10 shipped with 2MB of internal memory.