A new method for estimating the fundamental frequencies of concurrent musical sounds is described. The method is based on an iterative approach, where the fundamental frequency of the most prominent sound is estimated, the sound is subtracted from the mixture, and the process is repeated for the residual signal. For the estimation stage, an algorithm is proposed which utilizes the frequency rel...

The uncertainty principle imposes a fundamental limit on predicting the measurement outcomes of incompatible observables even if complete classical information system state is known. situation different one can build quantum memory entangled with system. Zero states (in contrast minimum states) are peculiar that eliminate uncertainties von Neumann once assisted by suitable measurements memory. ...