i asked this before but it wasnt answered...for people who use ipods only, can u just copy the cd to your ipod and use the dd-1 to set the gains by using the ipod??...or does it HAVE TO be with the test disc?..i ask because an ipod is usually louder than a cd and if u set your gains with a cd and then swap to an ipod, the gains wouldnt be set properly for that device, right??