An Automatic Jazz Accompaniment System Reacting to Solo

This paper presents an automatic accompaniment system for jazz that understands solist’s intention of improvising and outputs expressive accompaniment of a bass guitar and drums reacting to solo. Previous systems extracted just one parameter as solist’s intention and output accompaniment by switching registered patterns. Our system can understand solist’s intention in more detail by extracting five parameters as his intention from solo. In addition, to make accompaniment rich in variation, this system directly alters accompaniment data such as loudness, pitch and the number of notes, according to those parameters. In our experiment, it outputs appropriate accompaniment following the solist’s intention.