Exists already, check the cdxtract homepage. If you were lucky you were also able to buy an outstanding sampler editor called "Keymap Pro" from the App Store before Apple bought the company some year ago whcih can also do that.
Plugin latency issues? Phasing on parallel channels? Want to know the real latency of your audio interface? Try the VMG-01!
Professional Audio Engineer at Theater Bremen, Germany • Part Time Programmer