Perhaps it's just me, but I think some songs on my iPhone are consistently playing at different volume levels (w/o making a manual adustment in the volume). Two examples: 1. On the Gladiator soundtrack (from a CD), track 2 is much louder than track 3. 2. On the DAUGHTRY album (downloaded from iTunes), track 3 is much louder than track 2 or 4. Is this normal? Can I fix it? Thanks in advance.