WOW! The Melodyne tempo map feature is awesome BUT .. it's a real resource hog as well. In fact, I didn't realize it'd hoard so much RAM. I'm using an i7 core desktop with 16GB of RAM and Win7 Ultimate 64bit + SSD drives and so forth.
I opened up a studio recording with 22 mono tracks in it, only copied the tracks as they were (no plug-ins) and pasted them into a completely new project. I then ran Melodyne through the 22 tracks @ 48KHz/24-bit, the song altogether was a bit over 6 mins long and so were the tracks. It sure did clog up SONAR to a point where I was nearly convinced that there has been a memory leak or a similar bug somewhere and that I'd have to close down SONAR forcibly via the Task Manager.
Luckily, SONAR didn't freeze. The tempo calculation is excellent, in fact, it now does a much better job at times when compared to the old AudioSnap function, which has its good sides of course, but still. My problem is that even with just the 22 "raw" mono tracks, a 6-minute take and _nothing_ else running on the software or otherwise, it's really resource-intensive to operate. I noticed that upon activating Melodyne as clip FX for each of the tracks, SONAR now fills up around 10GB of RAM! That's just way too much for my setup. Either my workflow isn't correct or the Melodyne implementation just blows up the RAM memory usage.
The tempo insertion from a Melodyne-processed track worked just fine, but now I'm stuck with SONAR clogging up my RAM big time. if you have any ideas how I could easily adjust just a few parts of the song I'm working on tempo-wise, i.e. to first set the project tempo from a single Melodyne track, and then make other clips follow it, and not having to wait hours for the adjustment? All tips would be appreciated. I do have the latest Melodyne standalone purchased as well, so I could probably try doing the same task within the Melodyne 4 software. I also noticed that while the tempo mapping works just fine, it's yet another dead-end to select "follow project tempo" from the Melodyne Region FX menu.
As soon as the number of Melodyne-activated tracks/clips increase, the resource-grabbing gets real intense, up to the point that you can only try to wait it out. Saving the project as a plain .CWP file also becomes increasingly difficult as what was previously 1-2 megs has suddenly bloated into around 100 megs. And that's just the CWP project file. Also, when I got the project tempo from one of the Melodyned tracks, then selected all the tracks and from the to follow the project tempo (although it'd been already calculated and inserted from one of the Melodyned tracks), it'd completely throw the tracks in a nonsensical mess, so ... either I'm doing something wrong or all of the new Melodyne tempo map features don't yet work as they should.
In any case, the new Melodyne implementation is very promising, and if you only need to find the tempo from one track, it's an excellent tool for tempo mapping that way. Just beware if you have a multitrack project that needs tempo adjustment with individual tracks altogether, you'll clog up your system pretty quickly. :P