Hello, I have often music files with different sound volume to them. In the past I have used a 5 year old Nero Burning Rom software and the normalize option when burning to cdr but I recently noticed that it gives some "hiss" sound in the process. Only noticable when comparing old track with new using headphones. Are there any other.....hopefully free....that does this normalize thing without or less loss in quality? Would be great if this software support a variety of files. (mp3/wav,flac) Anyone??