Creator here. I love creating beats, but couldn't find a tool that exports sounds so I can use them in a DAW, so I created my own. Front-end is preact and the bundle size is about 500k, which I'm OK with. Chrome CPU is around 12% on my late 2013 MBpro with all the tracks playing. All samples by me, more on its way. MIDI out is next on the list I think. And maybe some kind of song mode / pattern chaining.