There is something like this already. You can render all the patterns into samples
and create multisample instrument out of them. (like a drumkit)
This trick would work nicely if there was an option that samples will play completely
until the next one starts playing. If you play accurate enough, this will work just fine.
Ps. Cause demo version doesn’t have render, you can use vst-recorder instead.
Rendering in renoise has option to render patterns and / or tracks into their own files,
so that helps a lot in this process…