It’s fascinating trying to play any kind of tune on the pads of this device when in “keys” mode. I have the sibling model and find it almost impossible to produce anything that sounds “normal”. I don’t really mind — it’s hardly <i>meant</i> to be a piano after all — and it certainly makes for an interesting phenomenon. It’s also one I think the designers nod to: the pads can be retuned to different scales suggesting a complete break from any kind of equal temperament octaves.<p>While I haven’t had the chance to ride one, I imagine it is the same feeling as riding a joke bike where the headset is geared to invert the sense of the handlebars (left is right, right is left) or using a pair of circlip pliers where squeezing the handles opens the jaws rather than closing them.<p>Alas, Teenage Engineering really set themselves a high bar with the OP-1 and I still don’t think they’ve ever come close to it. The OP-Z just didn’t compete without a screen, the pocket operators (and the K.O. II and Medieval, which have the same interface) have a much less intuitive design language, their IKEA lights are controlled by colour coded, identically shaped controls <i>on the back</i>, etc.<p>They are all lovely products at good price points that do their jobs delightfully but when they came from the same studio as the OP-1 it is like comparing a Pininfarina Peugeot 205 with a Pininfarina Ferrari 250.