We then applied some smart filtering and signal processing to adapt those buttons into something more like a slider or a digital potentiometer.

我们又进行了一些和信号处理，把这些按钮改良成类滑动条或者数字电位器的设计。

Other methods include a potentiometer which uses  a resistive track and a wiper that results in a change in electrical resistance.

其他方法包括使用电阻轨道和滑动片的电位器，从而导致电阻发生变化。