MP3Gain
MP3Gain is an implementation of ReplayGain. It can be used to just analyze files & recommend changes or to also modify the gain. If modifying the gain, it always modifies the global gain fields in the MP3 audio data. It can add somewhat precise metadata, including undo info. The gain can be modified to any target dB, or it can be changed by a specified amount. For balance correction, user-specified changes can even be made on just one channel in simple L/R stereo-mode files (not joint stereo).
Format: MP3
Method: Audio + Meta (in APE tag), or Audio only
APE tag fields (ASCII bytes):
MP3GAIN_MINMAX ###,### - minimum & maximum global gain values for this file. 3 digits, zero-padded if necessary.
MP3GAIN_ALBUM_MINMAX ###,### - minimum & maximum global gain values across a set of files scanned as an album. Optional.
MP3GAIN_UNDO +###,+###,N - the global gain adjustment to restore the original values in the left and right channels, respectively, followed by an indicator of whether to wrap at the extremes (N means no, W means yes). The adjustment values are 3 digits, zero-padded, preceded by a sign (+ or -).
REPLAYGAIN_TRACK_GAIN +#.###### dB - The value is always 9 characters including the sign and decimal point. Examples: +0.424046 and -10.38500
REPLAYGAIN_TRACK_PEAK #.###### dB - The value is always 8 characters including the decimal point. Example: 0.149923
REPLAYGAIN_ALBUM_GAIN +#.###### dB - The value is always 9 characters including the sign and decimal point. Optional.
REPLAYGAIN_ALBUM_PEAK #.###### dB - The value is always 8 characters including the decimal point. Optional.
Limitations: Although the metadata, if written, contains precise adjustment & peak values, the audio data modifications are limited to 1.5dB steps and may become irreversible (however, that's a very rare condition; see the "mp3gain is NOT lossless" forum thread)
http://mp3gain.sourceforge.net/
Εγώ δεν ακούω mp3, ή μάλλον ακούω μόνο εάν δεν μπορώ να βρω ή να ριπάρω αυτό που θέλω σε flac/wav.
Απλά δεν θέλω να δημιουργείται η εντύπωση ότι απωλεστικές μέθοδοι συμπίεσης, είναι ισότιμες με τις μη απωλεστικές, ή ότι οι επεμβάσεις σε απωλεστικά συμπιεσμένα αρχεία δεν έχουν καμιά επίπτωση...
Απλά αν κάποιος δεν τις ακούει (τις διαφορές εννοώ) και εξακολουθεί να χαίρεται την μουσική του,...είναι μάλλον πιο τυχερός από μένα που μου την σπάνε κάποια mp3...
