Band in a Box has a feature in which you can enter a chord into the chord grid by merely playing it on a MIDI keyboard that is hooked up and on the BB Thru channel.

Quote:


MIDI Chord Recognition

Play any chord on your MIDI keyboard and the program will recognize it instantly and insert it onto the chord sheet. Just press Ctrl+Enter at any time to insert the last chord that you've played on your MIDI keyboard onto the chord sheet, even if you aren't holding the notes down anymore! This allows you to enter an entire song without having to type in any of the chords!

There's also a dedicated window that displays the chord names as you play them, suggesting any alternative chord names for the ones entered.