The Alesis VI49 is an advanced USB/MIDI keyboard MIDI controller that lets you take command of your music software with a series of pads knobs and buttons. With 49 velocity-sensitive semi-weighted keys with aftertouch and Octave Up/Down buttons you can expand the keyboard to the full melodic range and play bass lines chords and melodies. VI25 also features 12 assignable knobs and 36 assignable buttons for manipulating effect plugins and virtual instruments: open and close filters adjust volume levels activate effects tweak parameters and more. 16 velocity-sensitive RGB trigger pads allow you to launch clips or finger drum with exceptional response and colorful visual feedback. Plus pitch and modulation wheels expand the expressive capabilities of your performing.