The Alesis V49 is a powerful, intuitive MIDI controller that lets you
take command of your music software with a series of pads, knobs, and
buttons. With 49 full-size velocity-sensitive keys and Octave Up/Down
buttons, you can expand the keyboard to the full melodic range and play
bass lines, chords, and melodies. V49 also features four assignable
knobs and buttons for manipulating effect plugins and virtual
instruments: open and close filters, adjust volume levels, activate
effect..