Steve Warson wrote:

Is not really to see the lights. What I am trying is to see in a mp3
encoded at 256 kbps that it has been ORIGINALLY encoded at that speed.
My impression is that there are plenty of re-encoded songs that had been
encoded, let's say, at 64 kbps and lately re-encoded at 256. I would
like to have a tool to see where the frequencies are actually cut-off to
have an idea about the actual encoding speed. Hope is clear keeping in
mind that my english is limited :-(

I doubt that a tool as limited as a spectrum analyser will be able to do this
meaningfully.

MP3 encoding uses more tricks than limiting HF content. 64kbits/sec is pretty
hopeless for music whatever.


Graham