Re: [LAU] Rolling off high frequencies when mastering?

The highest frequency possible to reproduce -with correct amplitude- is half the sampling-rate _only_ if the phase is aligned to the sampling-clock so that minima/maxima of the sinus are correctly sampled. If its out of phase, the amplitude is not reproduced correctly. It is easy to understand that this correlation between phase and correct amplitude also affects frequencies below half the sampling-rate. Might be as low as quarter of the sampling-rate, which in case of the CD is 11kHz. Below that you will have more then four samples to reproduce the sinus wave. That is in fact another reason to do the recording, mixing and mastering in more then 44kHz...