[msjjr]

I have a program called MP3 Doctor and another called ezMP3Edit that both claim to "improve"' a lower sampled mp3 file to a higher setting, eg, 128 up to 320, without decoding to a wave file first. Is this really possible to do and still get a sonically improved mp3 file?

 

[Nezer]

Is it possible to improve the sonic properties, sure. Is it possible to put data back in that was lost, hell no!

I'm sure these things work to a limited degree (as in makes the audio *sound* better) but you can't put something back that's gone for good.

Of course, *better* sound is always subjective. I would guess the trickery used would work better on some sources than others.