herulach, for my sony, i got pissed off with having insainly high bit rate (20gig suddenly becomes not enough when you get into a "new" genra or something).
So i unpacked everything to WAVE using dbpoweramp.
It took only 4days to convert some 60gig of lossless music to atrac. I did this before going back to parents for a weekend. Once converted it transfered to the device really quickly. (I of course had the player with me).
This is always a problem i find with players, with my stupidly expensive headphones, i can't hear the suttle high frequncies when i'm drifting away to elgar on the "silent" part of the train (i always listen to my pmp on the train in that carrage given the chance, no one else can hear it, so i don't think i'm been bad). So an Atrac3plus (which really isn't a bad codec
imo) compressed to 112kbps is really exceptable. So i decided i wanted all my pmp music at that quality. A mate has a seperate WMA 64kbps collection for his player.
Its worth noting the sony software isn't capable of been multi proccessor. So it takes twice as long as need be to convert music format. I've yet to find some software that takes advantage of SMP systems
With all players i'd recomend using them on that "spare" computer so you can leave it crunching all night, when you first get your player, you'll want to put SO much music on it, as soon as u decide (like i did) that you want a fixed bit rate, it will obviously take some time. This is always a pain in the arse. I keep a spare mini-itx system (cost me £100 to build) and its this sort of thing is whats its best for. Its one of those ugly things no owner tells you about (like ripping your CDs the first time.... don't ever use the software that comes with your player for this!).