Hi Neal, sorry if the jargon was off-putting.
Resampling the files means changing their resolution, for example making a 16/44 file out of a 24/96 file (which you would have to do to a hi-res music file if you wanted to listen to it on an iPod, for instance).
Changing the envelope, well, if you imagine a format like FLAC, WAV or AIFF as the wrapper, the music info is the candy bar. Changing from one to the other of these does not touch the music info, only the coding format.
Resampling the files means changing their resolution, for example making a 16/44 file out of a 24/96 file (which you would have to do to a hi-res music file if you wanted to listen to it on an iPod, for instance).
Changing the envelope, well, if you imagine a format like FLAC, WAV or AIFF as the wrapper, the music info is the candy bar. Changing from one to the other of these does not touch the music info, only the coding format.