The SL-1 and SL-2 and SL-3. Fairly simple but smart sliders to take control over input signals, either in mono or poly mode.
The controls and their functions:
[Slider] This is the control slider, really! It is used to attenuate the input signal before it flows to the output jack. [Link] This button links all controls from the left slider to the right slider and visa versa. [Range] This button switches the range of the slider between 0 ~ 100% and -50% ~ +50%. [Mode] This button switches between mono or poly mode for the input and output jacks. [Input] This jack is for the main input. It can be either an audio or a CV signal, such as a LFO or an Envelope. [Output] This jack is for the main output after it is attentuated by the slider.
The SL-3 is a three-channel mixer that can be switched between mono- or poly-mode.