Quick chord reference for musicians. Part tool and part toy, SimpleChord is a quick, handy reference to chords for musicians. It can aid in learning new chords, building progressions, transcribing, and other tasks. It displays the notes in a chord, their positions on the keyboard, and can even play the chord aloud. It doesn't stop there, though. SimpleChord has a full array of options for customization and can even accept input from a MIDI keyboard to help you find chords that work with your melodies. Among other cool features, it can build a database of chords on your iPod to take with you on the go.