Do you have to own a MIDI keyboard?

CNN: Create your own music on the Mac

You generally play a software synth using an external music keyboard plugged into the Mac via some variety of MIDI (Musical Instrument Digital Interface) hardware device for connecting electronic musical instruments to each other and to computers.

CNN: Create your own music on the Mac

The "MIDI Makes Music" campaign, sponsored by a coalition of leading industry companies and organizations including, Roland, Yamaha, Gibson, Fishman, Dave Smith Instruments, Korg, Dream, Mediamation, NAMM, AES, Keyboard Magazine, Electronic Musician Magazine and Robertson Communications, is designed to educate consumers about the benefits of MIDI technology.

ENGADGET: MIDI turns 30, gets year-long birthday bash from daddy Alt