@sqx I thought about this but I removed the brackets because it felt not very "forth-like" where you are supposed to manipulate the stack directly. I'm not really looking to make something Strudel like because the step sequencer that you can see behind doesn't play nice with it. It's a different model altogether, but I'm still figuring out what I can do to deal with some cases: polyphony, etc.. I will release the software after successfully eating my own dogfood: playing one or two gigs with it :)