Here’s a simple technique with the WTF (window transform function) oscillator from Dove Audio to make a “mega PWM” (yes Nick Batt would be happy) or “super pulse” wave. It involved setting the front and rear waveforms to squares, invert the rear wave form, set the window control to be dual and then use and LFO to open up and modulate between the two square waves. Happy times.

You can support the project and grab a WTF eurorack or 5U/MU module from the Kickstarter here – http://bit.ly/wtfvco