We know using one oscillator to frequency modulate another is a lot of fun…but just what is the difference between the different types of FM? I finally got my hands on a module – the Endorphin.es Furthrrrr Generator complex oscillator – that is capable of being switched (with some behind-the-faceplate fiddling) between exponential, linear, and linear through zero FM, so this is a good opportunity to finally make an apples to apples to apples comparison between the three.
I tried to see every module manufacturer I could find at NAMM that had new products, and I think I came pretty close…but I’m sure I missed a few. (My apologies.) Here are the last four I had a chance to chat with and take pictures of.