Hi! I use MZ-NH1 for 3 years. Under Windows XP i did't have any problems with SS, but after installing Vista Ultimate X64 i've met some problems. Actually SS 4.3 works with my OS. But when playing audio (neither converted to ATRAC3Plus or not) there's terrible growling sound. It's impossible to listen that. Other players like WMP 11, WinAMP 5.35 etc works properly with all the audio formats. After tranfering tracks to NH1 device through this SS 4.3 -->> same effect! Terribly growling and frying! What can i do?