Alesis fusion 6HD 61-Key Synth & Pro Recording Workstation Electric Keyboard 61 Notes Semi-Weighted Keys Four integrated synthesis types - Sample Playback, Virtual Analog, FM and Physical Modeling High-definition 24-bit sampler with comprehensive waveform editing, internal memory expandable from 64MB to 192MB 32 Track MIDI sequencer built in with integrated multi-channel digital audio playback Save and load programs off of a hard disk or removable Compact Flash Memory Card to store all your sounds and always have your programs available