Just finished replaygain scanning my entire music library which take roughly 3.5 hours LOL.

Anyways, if I wanted to synchronized my entire music library to my iPod Classic, would I need to apply track/album replaygain data to every songs I got which I already replay-gained? Before that, would my iPod be able to playback those song with normalized volume after I transfer those replaygain applied songs?

Btw, I still couldn't figure out what's the difference between track and album replaygain. It sounds no different to me whatsoever.

I choose the option 'Scan Selection as Albums (by tags)' by right clicking on the 'All Music' instead of one album after another. Did I choose the right choice?

Yes. iPods are not replayGain-enabled players.
Programs (like foobar2000 and winamp) and digital audio players that are ""replayGain enabled" are able to read the gain stored in a metadata tag and then playback the file at the adjusted level. However, programs and DAPs that are not "replayGain-enabled" cannot do this. Therefore, the work-around is to use the replayGain numbers (that you've already calculated) to adjust the actual gain data stored in the mp3 file data. This is what foobar's apply track/album replaygain to MP3 data command does.


Conceptually, replayGain isn't exactly normalization.
http://replaygain.hydrogenaudio.org/index.html

If you want an easy example, download the new Nine Inch Nails album (yes it's free).



If you can't hear the difference between the modes with the lights in the sky track, somethings wrong with you.

If you don't get the actual concepts, read this.
What it calls "Radio", foobar2000 calls "track".
What it calls "audiophile", foobar2000 calls "album".

Yes, if your files are tagged correctly.

ml_ipod in winamp lets you use either of the RG values to get the SoundCheck information. foo_dop automatically uses the album RG value to get the SoundCheck info. If you use these programs to copy your music (I'm not aware of other programs which can convert RG -> SoundCheck), and enable SoundCheck in your ipod, you should be fine.



If you listen to full albums at a time, set it to Album Gain, otherwise to Track Gain. It makes a big difference to me because I listen to music on Shuffle, and some of the songs are quite loud compared to others (Metal vs Classical). So Track gain makes the most sense for me.



You can just select all and use that command. It's smart enough to differentiate between different albums. If your files aren't tagged, there's also the scan selection as albums (by directories) option (it's hidden by default. You can enable it by going to context menu preference and adding it).

Wow, thanks for the reply. Really get to know much after reading your comments~ ^^

I use mp3tag and an action command that converts itunes soundcheck values to replaygain values. that is turns the sc values into ny album gain values. works very nicely! search this forum for lots of threads with the detail.