Thank you, solger! Your hints were enough to get me going: although groove markers remain somewhat elusive, the last link you provided was an indirect source of information. By following it and exploring a bit, I found out about mpl quantize tool. Wow.
I'm passionate about quantizing to grooves made from my acoustic recordings. Even simple finger tapping yields usable results.
I may come forward with more questions about this in due time. Thanks again.
