MIDI Auto-Accompaniment Section - Version 2.1 MIDI Auto-Accompaniment Section for Windows 95/98/ME/2000 is a software which offers all major features of a high quality MIDI keyboard. It comes with realtime chord recognition, style manager, song arranger, recording section, up to 16 "fingered" and 10 "two-finger" chord types, MIDI controls and about 30 demo styles. MAAS is an easy-to-use improvisation tool and a great aid to practise songs and melodies; a complete backing group for keyboarders, guitar players, bass players and soloists.