Output Signal, virtual Instrument, based on NI Kontakt/Kontakt Player, 500 playable Pulse Instruments, 40 GB Library incl. Analog Synths, Digital Synths and organic Instruments, up to 4 separate pulses at one time, all pulses lock to tempo, Looper, Step Sequencer, Arpeggiators, LFOs, 4 central Macro Sliders unique to each of the 500 Pulse Instruments, Box-Version with USB-Stick, System requirements: Internet connection, Signal runs in Kontakt or Free Kontakt player version 5.3.1 or higher, Mac OS X 10.7, OS X 10.8 or higher, Windows 7 or higher, 4 GB of RAM (8 GB recommended), 41 GB of free drive space