A close analogy is that the drum machine has 32 heads, and only one can be active at a time. Accent Button I can install a red pushbutton switch, like that in the memory system and the Devil Fish, most likely located to the upper right of the volume control, which activates the accent whenever it is pressed. Each output is post the volume control, and plugging a lead into it takes that signal out of the main mix. If you put a bright, continuous keyboard sound such as a chord into it, then you get metallic, shimmering fizzy Cymbal and Hi-Hat sounds which are tonally and harmonically related to the chord. Low input levels result in clear tonality.
Higher levels make it fizz and hiss but the relation to the chord is still audible.
The pushbutton switches of the TR-606 are open to dust, and over time dust compacts in the contact area, leading to flaky behaviour. I can replace all the switches and install a thin, flexible, internal plastic dust guard inside the machine which greatly reduces the amount of dust which gets to the switches. I have been doing this for Devil Fishes since 1993 and no-one has yet reported that their switches needed replacing. I can't guarantee the switches forever, but I am certain they will last much longer with the dust guard than without. Generally a TR-606 will need some minor repairs.