I have a similar issue (Supercollider 3.13), what we seem to have in common is Windows, 32 GB RAM, ASIO Fireface USB. I am sending in MIDI real time tuning and then playing from a Lumatone keyboard and generating audio using 4 mixed SynthDefs. Behavior similar: sometimes no crash, sometimes after 1-2 minutes, sometimes after 20 minutes. “Interpreter has crashed or stopped forcefully. [Exit code: -1073741819]”. As far as I can judge the code I’ve written seems solid. Anyone else on Windows out there experiencing similar issues?