MIDI Auto-Accompaniment Section 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. MIDI Auto-Accompaniment Section is Shareware, please copy and distribute it freely. The demo version has in general all features of the registered version except for the saving capabilities and the fact that only the about 30 supplied demo styles can be processed.