Although some might argue that it's a tad pricey, I must say that this works as advertised and extremely well at that.

It took almost two days to go through my music collection of almost 8000 songs and while it couldn't do anything with my protected iTMS songs (only the ones after iTunes 6 broke jHymn), using the suggested decibel setting of 91.5 meshes them flawlessly (so far - i've tested about 600 songs as of now).

iVolume 2 marks what songs it's processed by adding a long string at the front of your comments, while your comments are still there (at the end), they're a little harder to use because of the iVolume string (and I use comments like crazy for smart playlists). I was able to relatively painlessly change a freeware applescript to clean the iVolume comments out, leaving me with just the comments I started with, although I'll need to keep track of new additions to run through iVolume now.

Which brings me to this: what's changed in 2.01? No "What's new" section for the new version. I'm hoping for a change in the way the comment system works. A small "iV2" at the end of the comments field or something. Anyways, the developer seems really helpful, the app works great, and I'd recommend this to anyone. For a process that took almost 2 days unsupervised for an app, I can't even begin to think how many months this would take manually.