sony's can on the fly as well, they say you can't but you can trust me at least on the n707. theres a trick to it, you have to hit record>pause>menu>record volume>manual enter, then using the track skip you can adjust. all you have to do is hit pause, and make sure your counter is running, and you can adjust all you need from there... good luck, if you can't figure it out, let me know..
peace