![]() MM doesn't have have such option, and this is one of reasons why I prefer MP3Gain. If you turn off the option "Ignore (do not read or write tags)" in the MP3Gain program and when you choose "Apply Track Gain" (which is same as "Level Track Volume" in MM), after that you could undone this process with its option "Undo Gain changes" if you are not satisfied with the result. You only need to know the starting value for the volume level, before its modification. However, even in that case there is not re-encoding as you wrote, and actually you could revert back volume level for mp3 file without sacrificing its quality. On another side, if you choose "Level Track Volume", the global gain flag would be adjusted for all mp3 frames (this is what you say that cannot be undone) and such mp3 file could be reproduced equally even on players which don't support Replay Gain standard. Such value could read only players that support Replay Gain value entered to tags. I don't know exactly how MM works, but I suppose if you choose the option "Update tags when editing properties" from the Options dialog and if you choose "Analyze Volume" that MM stores the calculated value to some tag in mp3 file (this is what you say that could be undone). The bottom line is that I would like to use the best method of track and/or album analysis on my mp3 library and ensure any volume adjustments are recognized when playing my iPod Classic. Are there any conflicts or problems for iPod playback if I have both Track Volume and Album Volume tags populated? (FYI, I have Sound Check turned off on my iPod since I do not use iTunes to manage my music.) Is there a difference between how the MP3 Gain algorithm is used in MM3 versus the MP3 Gain stand-alone application? Put differently, would I get the same result written to the same tags whether I used MM3 or the MP3 Gain stand-alone app? In a related vein, how about an expert opinion between using MM3's track/album analysis versus MP3 Gain's stand-alone app?Ĥ. ![]() The MP3 Gain web site, on the other hand, states that the MP3 Gain stand-alone application does NOT decode and re-encode your mp3 files ( ). How does MM3 use MP3 Gain? The Help states MP3 Gain is used for leveling, which is supposed to alter the music in your mp3 files. Does MM3 use MP3 Gain or Replay Gain when performing track/album analysis? It appears to be Replay Gain but I have read conflicting information.Ģ. Your iPod will automatically recognize both track and album analysis tags generated by MM3 and adjust playback of mp3s based on those tag values.ġ. changes them) and there is no way to undo leveling.Ģ. Volume LEVELING, on the other hand, actually decodes and re-encodes your mp3 files (i.e. In MM3, track and album ANALYSIS add info to the mp3 tags but do not change the music in the mp3 files. Modifying the file's tags in another program, such as foobar2000, may cause any MP3Gain-specific tags to be stripped from the file.I have some questions and could use clarification regarding MP3 Gain and Replay Gain, specifically as they pertain to Media Monkey 3, the iPod (Classic in my case), and track/volume analysis.ġ. MP3Gain writes the following APEv2 tags, which is what allows the tool to reverse the changes: The way MP3Gain works actually has a very strong benefit: since it is the data itself that is modified, MP3Gain does not require special support from players. Likewise, if you subtract 1 from this field, you multiply the amplitude by 2^(-1/4) = 84 % = -1.5 dB.If you add 1 to this field in all the MP3 frames, you effectively multiply the amplitude of the whole file by 2^(1/4) = 119 % = +1.5 dB. ![]() When an MP3 player decodes the sound in the frame, it uses the global gain field to multiply the decoded sound samples by 2^(gain/4). This field holds an 8-bit integer which can represent values from 0 to 255. In each frame there is a "global gain" field. Each frame represents a fraction of a second of sound. ![]() The MP3 format stores the sound information in small chunks called "frames". Here's the technical reason on why it's lossless (despite operating on the data itself), and also why the smallest change possible is 1.5 dB: With MP3Gain, the loudness adjustment is done on the data itself, albeit in a lossless/reversible way.Īnother difference with MP3Gain is the fact that it can only adjust physical volume in 1.5 dB steps. However, with most other formats, the necessary loudness adjustment of ReplayGain is stored as metadata, thus leaving the encoded results alone. MP3Gain is an implementation of ReplayGain, supporting Track mode and Album mode. This way, you don't have to keep reaching for the volume dial on your MP3 player every time it switches to a new song. It can then adjust the MP3 files so that they all have the same loudness without any quality loss. MP3Gain is a program that analyzes MP3 files to determine how loud they sound to the human ear. ![]()
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