Trying to figure out what transcode this is

[vintologi]

Someone sent me a folder with 5 files over 10 years ago

File folder on MEGA

mega.nz

First i tried listening to them and then i thought

1: Lossless
3: mp3 320 Kbps
4. mp3 128 Kbps

But when i did some spectral analysis i found out that while 1 and 3 wasn't the same it wasn't an mp3, closest match i got was ogg vorbis Q100 but even that didn't fully match.

I remember thinking "is this really mp3, sounds better than expected but still not lossless" but then i thought "this track is probably suited decently for LAME mp3".

Using sonic visualizer:

1.flac

3.flac

 

[krabapple]

A comparative frequency graph, or a difference graph/spectrum, wouldbe more useful

 

[vintologi]

A comparative frequency graph, or a difference graph/spectrum, wouldbe more useful

Here 3.flac - 1.flac (amplified 30db)

1.6 MB file on MEGA

mega.nz

One possibility i overlooked was none of them actually being lossy such as 1 being ogg Q100 and 3 being ogg Q90

 

[vintologi]

I have the full song as flac (not the exact same release though) and here there is more HF content.

So all the files were lossy it seems.

The one i guessed was the flac was simply the highest quality version (probably).