Old 6th October 2006, 13:49   #1
HonoredShadow
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Replaygain help with options pls

What are the differences between Applying Gain, Preventing Clipping, and Normalizing?

What option is best for making the volumes the same please? I have read a previous thread with links to replaygain but i did not find the answer to what the basic differences are.

Could someone basically explain?

Also I want ALL my songs about the same volume level so should i pick album or track to save replay gain on?

Thanks all.
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Old 6th October 2006, 14:05   #2
gaekwad2
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Apply gain uses the calculated value to achieve equal perceived loudness.
Prevent clipping means if the peak level of a track (or album) is above the possible maximum (and would therefore get clipped on playback, causing distortion) that track's volume will be reduced.
Normalizing changes volume so that peak levels for all tracks are the same (not recommended).

Track gain gets saved along with album gain, just make sure you select Track as preferred source on playback.
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Old 6th October 2006, 14:12   #3
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If doing multiple files together, and said files include full albums, then always go for Album mode when applying the gain.

Album mode saves both Album & Track gain values, whereas Track only saves Track.


If you go to: Prefs > Plugins > Media Library > ReplayGain Analyzer (ml_rg) > config,
you can actually disable the prompt after each album (checkmark "ask after all files are scanned"), so then you'll just get one big list after the whole batch is done. Or you can automate the whole process by unchecking "ask before writing to file". The automated silent mode applies the RG values in Album Gain mode.


The recommended settings in Prefs > Playback are:

Amplification Mode: Apply Gain / Prevent Clipping

This will apply the gain value (the value applied depends on whether you've selected Track or Album mode underneath), and will also prevent clipping/distortion according to the Peak value set (see Peak values in RG Results window).

I haven't personally tried the Normalize option yet, but probably wouldn't recommend it anyway.


For Preferred Source, the Album mode will use the Album RG value, which is always the same for all tracks on one particular album. So if you select Album mode, then all tracks on that album will play at the same volume.

For Track mode, it will use the Track RG values, which can vary for each track on an album. Sometimes you'll find that it gets short quiet intro/outro tracks a bit wrong, and applies eg. +10dB, whereas the rest of the tracks on the album might be eg. -2dB

The default setting is Track mode, but I personally prefer Album mode.


Your best bet is to play around with the options until you find the optimum settings that benefit you the most. Basically, a lot of it depends on the format & quality of your encoded files, what ripper/encoder was used, what settings were used, the format/quality of the source recordings, etc etc.

Generally though, ReplayGain will attempt to make all your files play at roughly the same volume.

See if these links provide you with a fuller explanation:
http://en.wikipedia.org/wiki/Replay_Gain
http://en.wikipedia.org/wiki/Audio_normalization


[Edit]

Doh, too slow again... Hi Gaekwad2 :-)
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Old 6th October 2006, 16:15   #4
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Egg, most albums are just a combination of individual tracks, not a whole piece. With my admittedly limited understanding, isn't album gain is designed to work with whole performances like live shows or orcestral performances where it is desirable to keep the soft sections soft in relation to loud sections. By applying album gain to a studio album one may end up clippping louder tracks or surpressing volume on softer tracks, espcially if there is a wide degree of difference in the gain for individual tracks. At any rate there could be a noticable difference in volume level between tracks of an album by applying album gain. Shouldn't the reccomended setting for most applications be track gain?
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Old 6th October 2006, 16:43   #5
siebe83
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Most people prefer dynamics within an album to be preserved. The album was made with the intention for some tracks to be softer or louder than the others.

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Old 6th October 2006, 17:25   #6
Benski
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Quote:
Originally posted by germain47
Egg, most albums are just a combination of individual tracks, not a whole piece. With my admittedly limited understanding, isn't album gain is designed to work with whole performances like live shows or orcestral performances where it is desirable to keep the soft sections soft in relation to loud sections. By applying album gain to a studio album one may end up clippping louder tracks or surpressing volume on softer tracks, espcially if there is a wide degree of difference in the gain for individual tracks. At any rate there could be a noticable difference in volume level between tracks of an album by applying album gain. Shouldn't the reccomended setting for most applications be track gain?
That's why the default is track gain Just that many of us prefer album gain.
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Old 6th October 2006, 17:29   #7
germain47
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Quote:
The album was made with the intention for some tracks to be softer or louder than the others.
That certainly may be the case with some albums and makes sense for those albums if one were to listen to entire album like listening to a cd. But, does what you say also hold when listening to a compelation playlist with individual songs from many different albums?

edit/ sorry Benski, must have been typing when your post came through
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Old 10th July 2008, 08:27   #8
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Replay Gain doesn't overwrite your files, does it?
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Old 10th July 2008, 08:37   #9
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Nah. It writes some information to the Media Library database and the various tags for the file format in question.

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