Great application!

As of iTunes 11 (or maybe one of the later versions of iTunes 10.x), I've run into a lot of songs in my library that are no longer playing at the correct volume level. It used to be possible to "nudge" iTunes into re-reading the iTunNORM value from the file, but the old trick for this (editing some tag, then changing it back) no longer works.

1. Selecting multiple songs and changing one or more tag values no longer causes iTunes to refresh the SoundCheck value for those songs. Absolutely nothing will change when editing multiple songs. The *only* way to get iTunes to recognize the volume level in the file is to change a tag for one (and *only* one) song at a time, e.g. add "2" to the end of the album name.

2. Here's the worst part: as soon as you change that tag back, iTunes reverts to the wrong volume level, which means there's effectively no way to get it to recognize the SoundCheck level set by iVolume unless you're willing to have wrong info for the song. Even restarting iTunes between changes doesn't help.

iTunes now seems to have the original SoundCheck level for each song (as measured by iTunes when the song was first imported) stored in its big unreadable binary database, and apparently there is no longer any way to get it to update that value. If a song plays too loud or too quiet, it's basically stuck that way.

While iVolume itself still works quite well, this issue really defeats the entire purpose of using it. I've contacted the developer with a detailed report of this problem. Here's hoping he can figure out some way to work around this, because I've tried everything (and I've been coercing iTunes to do what I want it to do since v1.0, so I know my way around it).

What gives with the PPC/Intel 10.4+ requirements?

When I downloaded version 3.6.5 it was 10.6+ and Intel only.

OMG!

This is the worst case of NAGware I've ever seen! The registration window says it will remind you "from time to time to register."
That "time to time" works out to every 5 seconds!

When unregistered, the process only runs for 5 seconds before it stops and displays a registration nag screen. You must wait the designated amount of time before you may proceed: 1st pause=5 sec., 2nd pause=10 sec., 3rd pause=15 sec., and every pause after that is 20 seconds. So after running for 5 seconds, you must wait 20 seconds before you can run for 5 more seconds! Then, even though the process starts again, it provides an extremely annoying uh-uh sound when you press the Continue button. Maybe the registration screen pops up after a certain number of tracks have been processed, but it worked out to every 5 seconds for me.
And don't you dare go try to use another app while it's running, because in 5 seconds when it's time to hit Continue again, the icon begins bouncing in the Dock, making you want to punch the screen. I have now disabled Dock icon bouncing.

I didn't get to fully evaluate the app, because I don't have the patience or time to sit here pressing the Continue button every 20 seconds, and I'm not not gonna waste time making a script to do it for me.

I'm giving 2 stars for Features, Value and Stability just because I have to provide a rating to submit this review. They may merit 5 stars, but there's no way to tell since I couldn't test the app.

In my opinion this software is overpriced. I like to have my music at the same volume, but I'd pay around 4 to 6 euro's for it, tops.

IVolume 3.7 crashes immediately on startup. I use a iMac27 and latest version of Mavericks. Anyone having the same issue?

No problems however when returning to iVolume 3.6.6.

This app seems to work, but I'm finding recently (since 10.6) that
random songs that were previously adjusted now are gray, and need a
re-adjustment.

Also, songs that have been played many times mysteriously come up as
"File Not Found" in this app. I've gone so far as to remove the songs
from the Library and re-add them, but no change. I've tried to get an
answer from the developer, but no reply yet.

I have about 9600 songs - does this make a difference in the way
iVolume works?

And there's still no alternative to this?

GOT 'NO TAG' ERRORS - WHAT'S UP?
This is the overall problem I am reading in others comments. I am using the demo mode and in the 10 song limit I found this to be true as well. I went to the website to see what's up before I buy this app and the problem is addressed clearly. Here's the answer/explanation:

iVolume is adjusting the tag named 'iTunNORM' that is embedded by iTunes directly into the tracks when 'Sound Check' is turned on. If the 'iTunNORM' tag is missing in a song, iVolume can't adjust that song. The result is a 'No Tag' error. If you get 'No Tag' errors in iVolume, first make sure that 'Sound Check' is turned on in 'iTunes > Preferences… > Playback'.

Sometimes you may still get 'No Tag' errors for many tracks. Especially older iTunes versions tend to store the 'iTunNORM' tag in its internal database instead of inside the track files.

In this case you can force iTunes to put the missing 'iTunNORM' tags into the songs by performing the following instructions:
http://www.mani.de/en/software/macosx/ivolume/faq.html#tag