Complex sentence: It was a floor-type machine with built-in speaker and keyboard featuring the manual play, in addition to the multiple automatic rhythm patterns, and the price was comparable with the average annual income of Japanese at that time.
Split into simpler sentences: It was a floor-type machine with built-in speaker, and featuring a keyboard for the manual play, in addition to the multiple automatic rhythm patterns. Its price was comparable with the average annual income of Japanese at that time.