All excellent points, and I think you should DM me on twitter to chat about this more. (I hope you will!) DCT is on my radar. But there are several serious lim

All excellent points, and I think you should DM me on twitter to chat about this more. (I hope you will!) DCT is on my radar. But there are several serious limitations that I think are overlooked. For example, convolution is no longer a simple component-wise multiplication. This seems, to me, a big deal. Complex numbers are tricky to model, but I think most people have given up too easily, or haven't been creative enough in how they're modeling them. Some of my (outdated) ideas: https://gist.github.com/shawwn/c6865fccafac5066e1c7bab6727814e0 https://gist.github.com/shawwn/c6865fccafac5066e1c7bab672781... In other words, you're probably right, but I'm focused solely on FFTs on the (very low) chance that people have overlooked something that will work well.