bvideo
Could you explain how your process in post #4 preserves the finer-grained timings? Seems like you might have meant that "all other beats in the measure will adjust proportionally" implies something that could align the finer grained transients, but I don't see how.
I see how using "quantize" (not quantize to pool or groove) would align the major beats that were used to derive the tempo map, but I don't see how the finer grained timing is applied. Or maybe it is good enough to let the finer grained timing of the different instruments to not be aligned with one another.
Bill B
So, everything I was writing about was colored by the fact that I'm dealing with human-played material. And I'm also assuming these musicians are not gawd-awful, to start with- let's say your players have "pretty good" rhythm (if they don't, they need to practice, then come back into the studio!)
Given that, what I'm finding is that it's not necessary to quantize every last 8th note to the groove source, one by one. And remember, the groove source that I am referring to here is not "Perfection." It's just another human player's groove. The whole premise here is to preserve some of the timing "imperfections" that make a performance sound human. (ie, soulful...)
So if the beginning of every measure locks in to the groove, or at most every half-note, then I am finding that the rest locks very well, using this tempo mapping method.
Because by aligning the project time ruler with the groove, the smaller notes in between will effectively "stretch" themselves proportionally, between the locked beats of each measure.
The problem I had with "Pool quantize" is that if you set it to "half note" accuracy, then only those beats that fall on the half note get quantized, and the rest are just ignored and left off rhythm. This makes no sense.
But if you quantize to an 8th note of accuracy, an 8th note beat will only be quantized if your groove source track (from which you got your pool) had a note played on that 8th note. Again, the rest are ignored.
I'm saying, for me, this is the critical flaw in Pool Quantizing. With the tempo map, all the smaller "in between" beats will stretch proportionately between the beats that you locked in at each half note or measure, whether there is a "pool marker" there or not. And I'm finding that makes my material sound very tight (so far:)