Hi, since TOS8 requires a double-blind test and a sample audio file so that others can examine it, can you upload a lossless snippet of this song for us to examine?
Just grabbed the aac and vorbis files from Youtube and got some interesting track peaks (see attached screenshot). Just wanted to make sure it is not the cause of audible differences to avoid some useless or even harmful codec tweaking for developers.
a) For lame3995o use the link I gave in reply #6. I just rechecked, it works. (In the lame3995o thread the original link doesn't work any more, but I gave the working reply #6 link later).
It would be great if you could re-ABX exactly this snippet and provide us with the information about the spot where you find the deviation the easiest to detect.
Sure, I've attached the first 30 seconds of both the WAV and MP3. I truncated the WAV using audacity, and the MP3 using the lossless mp3CirectCut utility.
Though please note that there is nothing remarkable about this song at all in my opinion. It was just a random track!
I honestly don't understand why you've mentioned YouTube
If there is anything 'wrong' with the files I've been using, I hope someone can figure out what. I did think that the two tracks had the same gain but maybe I was wrong? It would be nice if I was somehow 'wrong' about all this, though I'm not sure how I could be, since I have simply encoded the files using the LAME source (V0) and nothing more complicated than that, so the mp3s should be the same gain right? I think I probably added ReplayGain tags, but ABX obviously ignores that.
If you are going to redo the test, you should encode the trimmed wav file to mp3 instead of encode the whole song to mp3 then cut it, since the mp3 file you attached is almost one second longer than the wav.
Does it mean you have a good chance of telling mp3 V0 and lossless apart, no matter what file it is? Then I am more interested to know if you strictly need lossless, or another supposedly better lossy codec may suffice. In this case I would provide several lossless and correctly encoded (time aligned, no gain problem) lossy files in different genres for you to try so you don't need to worry about doing something technically wrong. Are you interested?
It is a Windows issue, not specific to playback software or replaygain.https://hydrogenaud.io/index.php/topic,104051.0.html
Sure, I'd be interested in any kind of tests you have, though I don't have a whole lot of time at the minute so can't promise to do a lot of testing.
That thread is 'over my head'. In simple terms, do you think this could be just a simple matter of the gain? If that were the case then I would be delighted. I don't really care if there's some bug that makes my mp3s slightly quieter than the original, just as long as they're transparent when played at the same volume.
In the Wiki Article an error of only 1 percent is allowed whereas the foobar ABX procedure allows for 5 percent.Being within a guessing probability of 5 percent maximum is what is usually accepted here.