Get ready for an unbelievably inspiring trip into a universe of out-of-this-world sounds. Spectral molding uses frequencies to materialize crosses between recordings for truly creative sound design.For example, imagine a guitar recording with an acoustic texture of vocals. This creates a well-balanced mix, for example with guitars and vocals. Use the frequency spectrum of one layer as a cast for the overall mix. Revolutionary sound design Mixing with Spectral Casting Test Spec Sound Forge Pro Mac 3.0.0 (build 97). The OS X version retains its polish but now has a feature set to interest potential users at all levels.