Key Features of Portable Digital Electronic Musical Keyboard

• Musical keyboard: The plastic white and black piano-style keys which the player presses, thus connecting the switches, which trigger the electronic note or other sound.
• User interface software: A program [usually embedded in a computer chip] which handles user interaction with control keys and menus, which allows the user to select tones [e.g., piano, organ, flute, drum kit], effects [reverb, echo, telephones or sustain], and other features [e.g., transposition, an electronic drum machine].
• Rhythm & chord generator: A software program which produces rhythms and chords by the means of MIDI electronic commands.
• Sound generator: An electronic sound module, typically contained within an integrated circuit or chip, which is capable of accepting MIDI commands and producing sounds.
• Amplifier and speaker: a low-powered audio amplifier and a small speaker that amplify the sounds so that the listener can hear them.