Quote:
Originally posted by spalding4:
the earliest form of auto accompaniment was a drum machine built into an organ so that the organist had a percussion section whilst they played . It was roland 1960's

"The first commercially available rhythm machines were included in organs in the late 1960s, and were intended to accompany the organist. The first largely successful drum machine was the Rhythm Ace. It was produced by a company then called Ace Tone (later called Roland). In 1964 it developed the Ace Electronics R1 Rhythm Ace. The R1 was possibly the world's first fully transistorised rhythm machine but, despite interest and sample orders from American manufacturers, it didn't get any wider success."



I remember those. Weren't they generally known as "knocker boxes"?