I think that I've asked this question before, but here we go again.
I have an iPod Classic 160GB and it will now no longer take any more music as it is full. My music is stored as ALAC files on my Mac mini and NAS and my laptop and iPod have 256 Kbps VBR mp3s.
My question is, if I further compress the 256 library to 192 to fit on the iPod, will there be any chance of creating a noticeable change in sound quality other than what might be possible to distinguish as a straight 192 rip from a CD?
I'm not convinced that at 192 Kbps AAC, I would be able to tell any difference from a lossless file in the first place, but in this instance, the files are being compressed further or re-compressed.