Conceptual synthesisers are emerging! Ewa Justka’s (Optotronics) Oi, Kant! is a drum/bass machine packed with features. It boasts four independent sequencers (named: Stupid Cunt, Cantinflas and Cantaloupe & Canterbury), a drum voice (Can’t Touch This), bass operator (Cantor’s Set), Enlightenment Symbal (Canteen) and a resonance filter based on the Ms-20 (Tadeusz Kantor). The instrument is open source and schematics are available online. The circuit board layout file is named kant_destroyer-Cu.png