Hi, thanks for the reply.
A softpot is a thin metallic strip encased in flexible clear plastic. The ones I have are about 25cm by 2 cm. They have 3 terminals at one end: centre and right connected to the top of the strip (right terminal is marked with an arrow pointing out), and left running down the side and connected to the bottom end of the strip.
The idea is, when you run your finger along the strip, it will send a variable resistance message, thus functioning like a mixer fader.
They're a bit expensive, which is why I'm being a bit cautious. Which pins of the Arduino to connect to? And should I add in a resistor somewhere? Any help much appreciated. 