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Post new topic This topic is locked, you cannot edit posts or make further replies.  [ 12 posts ] 
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 PostPost subject: MP3 Music Question        Posted: Sat Nov 29, 2008 8:55 pm 
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i have a bunch of Metallica MP3s, there great quality but somewhat quiet

does anybody know of an app that will increase the volume of a batch of mp3 files?


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 PostPost subject:        Posted: Sat Nov 29, 2008 9:01 pm 
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Audacity.


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 PostPost subject:        Posted: Sat Nov 29, 2008 10:59 pm 
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Goldwave.


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 PostPost subject:        Posted: Sun Nov 30, 2008 12:15 am 
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i tried audacity couldn't figure it out

ill try goldwave


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 PostPost subject:        Posted: Sun Nov 30, 2008 2:10 am 
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For audacity you need to download lame mp3 codec and tell it you have it after extracting it from the zip then you have to import the mp3 use the amplify effect to make it louder then export as mp3 at the same kbps.


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 PostPost subject:        Posted: Sun Nov 30, 2008 4:21 am 
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MP3Gain. Simple name, simple program.

http://mp3gain.sourceforge.net/


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 PostPost subject:        Posted: Sun Nov 30, 2008 4:35 am 
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i did it with goldwave, increased the volume by 200%

souds great


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 PostPost subject:        Posted: Sun Nov 30, 2008 9:04 am 
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inxsfan92 wrote:
i did it with goldwave, increased the volume by 200%

souds great


That doesn't change the bitrate any at all does it? I have a lot of mp3s that are just a tad bit to quite and would love to increase the loudness a bit but I do not want to have them turn into transcodes.


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 PostPost subject:        Posted: Sun Nov 30, 2008 11:11 am 
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You cannot process an mp3 without it being transcoded. Any application will need to decode the mp3, process it, then encode it again which is why they either come with an mp3 encoder or require one before being able to resave the mp3. Simply doing this once will not make any difference. It would take several decoding/encoding cycles of the same file before any drop in audible quality would be noticable. You can save the file at the same bitrate as the source mp3 but there will still be an addition loss of information with each cycle. Only metadata can be altered (tags/replay gain ect) without needing to decode/encode the file. Only lossless formats like flac can be decoded/encoded multiple (infinite) times with no loss in quality. You may want to look into adding replay gain information which can be used by most decent media players to adjust playback gain on the fly, this avoids damaging the files further but achieves the same end result.

http://en.wikipedia.org/wiki/Replay_Gain


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 PostPost subject:        Posted: Sun Nov 30, 2008 8:45 pm 
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i saved all mine as 320kbps MP3s 44khz

they sound great

the came from the exact bitrate


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 PostPost subject:        Posted: Sun Nov 30, 2008 9:40 pm 
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ReplayGain is the best way of managing the volume of sound files without modifying the sound.
Protip: Your RG value should be at least +60 dB

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 PostPost subject:        Posted: Tue Dec 02, 2008 7:41 pm 
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MP3:s actually support a tag where you can specify by how much you want to raise or lower the volume. If you got a decent media library/player then they read the tag and adjust the volume as specified. Some applications like Itunes etc even detects the overall volume and adjusts it so every track is the same.

If you modify the track to normalise the volume you'll need to re-encode the track, thus losing quality. But only if you use a lossy format like MP3. If you used FLAC or any other lossless format then you won't lose any quality except for the information "cut" off at the peak if you raise the volume too much.

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