[robhack]

Hard to say, I feel it helped a little, as in, when I'm playing with my teacher (without MeloCraft), I more often get the feeling « oh, that doesn't quite sound right, I should move my fingers a little bit ». But that's N=1 and I didn't do any meaningful before/after tests.

That said, even if the tool doesn't help for the musical earing directly, it can still help to correct the position of your fingers, and that's very important for muscle memory. So instead of training for hours on the wrong finger position because I don't have a musical ear, I can correct myself and properly train my muscle memory correctly.

Well, you're very lucky to have a relative pitch, I think you can still train for it as an adult, but it may require more time and still might not be possible for everyone. Don't take my word for it thought, I don't recall any solid research on the subject.

[SwellJoe]

Relative pitch is definitely learnable as an adult. So-called perfect pitch is the ability that has been thought to be something you're born with, or not, but more recent research indicates that kids can have it "turned on", or at least, kids can develop relative pitch that is good enough to be indistinguishable from perfect pitch, for all intents and purposes (the listener just has to refresh their pitch memory with a reference pitch now and then...maybe once a day).