This video, via alternatingbitmusic, takes an in-depth look at the Dove Audio WTF Oscillator.

WTF stands for Window Transform Function – this oscillator lets you morph between waveforms in a unique visual way, by controlling a ‘window’ that lets you switch between a foreground and background waveform.

While the video demos the MU version of the WTF oscillator, it’s also available as in Eurorack format.