The best "delossifier" I know of is to start with a proper wave file 96/88/44khz @ 32bF/24b/16b and use a LOSSLESS codec like FLAC. With all this jabber about optimizers and tons of strings of useless code, the end result is STILL A LOSSY RESULTANT FILE WITH THE SAME ARTIFACTING GARBAGE AS ANY MP3 (or other lossy codec). Sure you can minimize the artifacts, but it's still a crappy end result IMO... Until a new phenom codec is invented that compresses like MP3 (or better) but retains all the audio information (lossless) with no artifacts I will continue using FLAC. The extra space IMO, is a better compromise than having to listen to shitty MP3 encodes..

 

yep, to the trash it goes

 

Yea I tried it and saw the same thing

 

last minute - new colab dropped

:^)

Spoiler

^made by same user that made FFmpeg

 

Merry Christmass to all.

A plausible delossification can be somewhat performed (read approximated) only by exploiting neural networks...

...that's why "someone" are still waiting for the next - Intel - OpenVINO™ AI Plugins for Audacity !
(note: some interesting models listed in this discussion)

 

New Year bump !

Here's my 1st mp3 (320) delossification test using Apollo model (by MVSEP):
https://mvsep.com/result/20260104124359-39e8135e24-machinimasound-com-shadows-of-the-mind.mp3


Before:


After:

 

crap, not perserving frequency dynamics and SEEMS to cut >16k before inference

 

Errr... what you mean ?


DR is exactly the same (8dB)...

...about freq cut: check the original mp3 file yourself !

 

Last edited: Jan 4, 2026 at 3:32 PM

Compare the spectrograms at 17.5k and above, these are not identical. High frequency mangling is the base idea of upsampling, but if it's not preserving the original harmonics pattern and dynamics, the tool level is questionable

 

They of course CAN'T be: (high) frequencies are GUESSED by the model in the "restored" file.

I don't know how Machinima encoded the original file, but frequency cutoff it's an mp3 "feature" (that's why we're looking for delossifiers)

...anyway here's a more detailed Deltawave Null Comparator spectras:

BEFORE:


AFTER:


DELTA:


Other interesting measurements in the HTML export.