Hi,
On 18.07.05, Dag Wieers wrote:
On Sun, 17 Jul 2005, Joerg Lehmann wrote:
On 17.07.05, Stefan Wimmer wrote:
didn't you find anything in the HydrogenAudio Forums (http://www.hydrogenaudio.org/forums/)?
I found a link to that forum, however, didn't look around too much. Is it really necessary to search in an internet forum to get information about this "standard"? Oh well...
A little search on replaygain gave me a tremendous amount of hits :)
Yes, too many ;-)
I even don't know how to add ReplayGain tags to an mp3 file. There is mp3gain, which adds some tags but also changes the file itself. But this is obviously not what one wants - otherwise nobody would complain that PyTone doesn't support ReplayGain...
I would already be glad if we had support for the ogg replay-gain support (most of my soundfiles are ogg files anyway) and creating tags is best left to specialized tools anyway, so using the correct (available) tags is the only thing we need to care about.
And looking what tags have been added by the authoritative (available) tools for Linux will further trim the possibilities I guess.
That's what I was trying to do for MP3 files. However, I failed because I couldn't manage to bring the supposedly authorative tool mp3gain to insert tags (and not to adjust the whole file) ;-) And if somebody provide me with a pointer to a reference where I can find all this, it would really help.
As far as I understood, the difference between track gain and album gain is a technical one in the sense that you may want all tracks from the same album being 'leveled' based on all tracks (and not on a per track basis). For a classical CD or a rock concert, this is pretty much required.
I don't think these are different tags, just the value is based on different sources. So for playback (pytone) it doesn't really matter.
I think it matters. The idea is proably that when you play the whole album, you should use the album gain. Unfortunately that's not so easy to achieve. Suppose the following playlist
1. Album1/Track 1 2. Album2/Track 1 3. Album2/Track 2 ....
If we only look one song in advance, we will find that the first playlist item uses the track gain, the second one as well because it's from a different album, and when playing the third one, we realize that it's from the same album and that we had better taken the album gain for the previous song. But then it's too late...
And even, if we recognize albums correctly, we will have a different loudness of track 1 and 2.
So, it's probably impossible to do the correct thing when mixing album and single song playback and maybe the only solution is to ignore the album gain altogether.
Jörg