Here's my summary of how I *think* MediaMonkey functions right now. (I did some testing by making copies of files and using different formats and sync options.)
When synchronizing with the "level volume" option for auto-conversion
* FLAC -> m4a appears to correctly level the volume in the process
* If you select "level volume" after a song is already on the iPhone you need to manually delete the song and re-sync in order for volume leveling to occur
* For "native" songs such as mp3's that contain a track gain, it appears that MediaMonkey does NOT level the volume, but instead keeps the track gain value in tact. So as long as ReplyGain is enabled on my iPhone this actually works as I would like it to work.
When synchronizing with the "level volume" option NOT checked
* FLAC -> m4a loses the gain value and it does not level volume (as expected)
* Transferring tracks natively maintains the gain value
So bottom line for MM3 users:
* The best option to use is to click the "level volume" box in the auto-conversion options.
* If you previously had the box unchecked you will need to delete all files without a track gain value, set the "level volume" option, and then re-sync. They will still appear with no track gain value, but this time they should be leveled already.
If this thread helps you, please reply! Then I'll at least know I wasn't wasting my time typing all this info into a thread!

Here's my summary of how I *think* MediaMonkey functions right now. (I did some testing by making copies of files and using different formats and sync options.)
When synchronizing with the "level volume" option for auto-conversion
* FLAC -> m4a appears to correctly level the volume in the process
* If you select "level volume" after a song is already on the iPhone you need to manually delete the song and re-sync in order for volume leveling to occur
* For "native" songs such as mp3's that contain a track gain, it appears that MediaMonkey does NOT level the volume, but instead keeps the track gain value in tact. So as long as ReplyGain is enabled on my iPhone this actually works as I would like it to work.
When synchronizing with the "level volume" option NOT checked
* FLAC -> m4a loses the gain value and it does not level volume (as expected)
* Transferring tracks natively maintains the gain value
So bottom line for MM3 users:
* The best option to use is to click the "level volume" box in the auto-conversion options.
* If you previously had the box unchecked you will need to delete all files without a track gain value, set the "level volume" option, and then re-sync. They will still appear with no track gain value, but this time they should be leveled already.
If this thread helps you, please reply! Then I'll at least know I wasn't wasting my time typing all this info into a thread! :D