[quote name='ZilchWoolham' timestamp='1505409679' post='3371743']
but if you're trying to match, say, a recording of a rock song from the 70's to a drum machine, you're probably going to have a hard time.
[/quote]
In a modern DAW you can make a 'groove map' from a varying tempo track and trigger drum samples from it - it's not really a problem anymore with modern software and confusers