Find the solution at the 5th Edit of Conclusion in the 8th post of mine .
I want to report the bug I suffered from 2 months ago but did not realised really what causes my mp3 files to have a strange noise of annoying scratch at the beginning .
2 months ago I've noted that some of my mp3 files got this kind of problem when playing them in the background of video games (as soundtracks) so those audio-players which are built-in the game engines reads always that scratch noise unlike the Windows-Media-Player that certainly not playing the first frames of mp3 files so maybe it just was designed that way to expect this kind of file corruptions . So that's why I used to mute the music in the game and playing the background music always with WMP to not hear those annoying scratch noises while playing .
After several weeks I switched to a new media player Media-monkey that has different mp3 input plugins so I could again listen these scratches at the beginning of my tracks just same as in some game engines that plays also the very first frame of each mp3 file .
I can hear it in many of my mp3 files (Well , actually all those files that I've tagged with Mp3tag , but I still love Mp3tag)
I started to realise that this caused by mp3 tag but I wasn't really sure so i decided to start a new file analysis comparing between original mp3 untagged files / tagged and same converted to WAV file .
So my analysis results showed me clearly that the sound artifact is caused by tagging the file (I also think it may appear in any format not just only mp3 that has been tagged with Mp3tag)
Step by step :
- Having the original soundtrack files of the game as mp3 files without any sound artifacts .
- Copying the files and tagging them with Mp3tag . now i can see in the wave monitor (with sound editor) that some new sound data is added to the track at the first frame (first 20ms) (possibly the new field/tagging data from Mp3tag such as album art and comments)
- Converting it again to mp3 with fine converter , The strange sound artifact is removed by the converter (tags remains) - Brave .
- Tagging again with Mp3tag some of the fields in the flushed mp3 file , Again see the strange artifact comes back in the wave monitor ... So it will come back every time when tagging the files !
- Converting the same mp3 again to .wav tagless format , The strange artifact does not exists and could not be .
- Playing the files with WMP showed no difference . My guess is that WMP's mp3 encoder is skipping the first frames , Or it just too smart to mute this kind of artifacts at the beginning of files .
- Playing with MediaMonkey the corrupted mp3 (with the artifact) . And i can hear the strange scratching unthinkable noise .
- Checking the files with Mp3test , It reports me an encoding error in the file that was tagged with mp3tag but the other original mp3 soundtrack is clean of errors ! <- this was enough for me .
Here is the picture that represents the strange artifact caused by Mp3Tag's taggings . It exists almost in any of my mp3 files since i used mp3tag to tag them .
Well I really hope this artifact/bug would be fixed soon in the next version and mp3tag would become again my ideal tagging software . Meanwhile I am just afraid to tag my mp3 files lol