iPod Sound file compression when sync to Ipod classic

[Big Ron]

I have an 80Gbyte Ipod classic that is nearly full. I have often noticed the option to convert mp3's to AAC upon syncing however;

If i choose this option does it just compress/convert the songs on my ipod only or does it also compress/convert the original mp3's that reside in my Itunes library on my IMac?

I would rather leave the original mp3's untouched for copying to my wifes netbook?

Thanks

 

[VNM]

It just compresses them on the fly as the songs transfer. The originals in your library are preserved.

 

[Big Ron]

Thanks for the speed reply VNM, I shall crack on and let it "do it's thing"