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Rockbox mail archiveSubject: Re: replaygain and id3v2 / RGAD tag?Re: replaygain and id3v2 / RGAD tag?
From: BlueChip <cs_bluechip_at_webtribe.net>
Date: Wed, 10 Aug 2005 19:11:41 +0100 AHA! I had not previously realised a difference between MP3Gain and ReplayGain ...thanks for correcting me :) BC >err... MP3Gain (not ReplayGain) stores the ReplayGain gain (rounded to the >closest 0.5dB) in each MP3 packet and adds replaygain info (as APEv2 tags, >which still aren't yet supported by rockbox but ask me for a patch) to the >file. > >ReplayGain is just the way you compute these gains (using the so-called >"equal loudness" heuristic) plus some recommendations on how to store this >in a few file formats: >http://replaygain.hydrogenaudio.org/file_format.html >(this link was in my original message) > >-MPC, Ogg and APE have native ReplayGain support. > >-MP3 has no native support for the ReplayGain tags (thus the use of >mp3gain is recommended), but such tags can be read by the player from the >id3v2 or APEv2 tags. Rockbox supports id3v2 tags. Foobar2000 supports >APEv2 and id3v2 tags. > >-for WAV, you can either use APEv2 tags (anything after the end of the >"data" chunk should be ignored), of store the gains in an extra RIFF chunk. > >Fred > >BlueChip wrote: >> >>>>I would need that part which parses binary replaygain info to implement >>>>replaygain on WAV files too, so if id3v2 should use it also then that >>>>binary parsing function should be done in replaygain.c I guess. >>> >>> >>>Where would the tag be stored for wavs? But extracting the values from >>>the RGAD frame and converting them to something usable for replaygain.c >>>should be easy enough... (And I'll soon commit something that should >>>make it a little bit easier :). >> >>ReplayGain is a tool to tweak MP3 packet headers, as such it only works >>with MP3's. I suppose you could implements a system that will work with >>WAV files, but it will not be "ReplayGain" it will be "Magnus' WavGain" - >>although if Rockbox pick it up as a new standard, it might stand a chance >>of reaching the public eye :) >>_______________________________________________ >>http://cool.haxx.se/mailman/listinfo/rockbox >_______________________________________________ >http://cool.haxx.se/mailman/listinfo/rockbox _______________________________________________ http://cool.haxx.se/mailman/listinfo/rockbox Received on 2005-08-10 Page template was last modified "Tue Sep 7 00:00:02 2021" The Rockbox Crew -- Privacy Policy |