这个 Hammond AutoVari 节奏单元最初内置于 1970 年代的老式 Hammond Dolphin 风琴中。虽然它只有 7 个节奏按钮，但每个都有 4 个变化，所以总共有 28 个节奏。该装置本身包括用于管风琴自动伴奏部分的电路和控件，但没有可用的电路图或示意图来了解如何访问它。
This Hammond AutoVari rhythm unit was originally built into an old old Hammond Dolphin organ from the 1970s. Although it only had 7 rhythm buttons, each one had 4 variations so there were 28 rhythms in all. The unit itself included circuitry and controls for the organs auto-accompaniment section but no circuit diagrams or schematics were available to see how to access it.