First off, Mike, I moved this topic from being a reply to an old post from 2013! to it’s own topic. Please do not just toss a question at the end of an (old) existing item unless it’s totally on-topic (which it wasn’t in this case either).
Your question is about flexible beatgridding. You don’t mention the software you use, but I assume that it has something to do with an iPad app as that is where you posted this question in the first place.
Some software, but not all, allow for the kind of flexible beatgridding you mention. You can set a new beatmarker at the beginning of every section where the beat changes and grid that part, then a new beatmarker when it returns to normal, etx.
This of course takes work and some knowledge on how to set markers and adapt beatgrids, which you say you know how to do.
At the end of the day, if you software does not support that kind of beatgridding (and it’s not just obscure software that can’t do that, Traktor has been long-lagging when it comes to offering a flexible beat gridding option for example), that is just it. Time to break out the old manual beat matching skills and do things by hand.
You can stay within a narrow genre range and pick only the tracks that will grid correctly. In all other cases if you can get 80-85% of your tracks correctly gridded and syncable, you did well. This still leaves 1-2 tracks out of every 10 that won’t let themselves be synced. It’s why we emphasize being able to manually beat match, even in these days of Sync options.
Even if you have only griddable and syncable tracks, if all you do is synced transitions, your set will sound boring and bland. Mixing up your transitions is more important to a lively and inspiring set than 2 hours of seamless, synced transitions, imho.
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