Fourier Machine:

When I am working on operating systems an idea come into my mind. We are using digital machines , especially von Neumann architecture. But human's are communicating with sounds , we can apply this for machines actually. Let represent sound 'a' with specified frequency for example 600 Hz. If we can store this frequency value in a memory we will be able to listen machine language. Than we can add or subtract two frequencies with using mixers , we can multiplex different circuits using analog multiplexers like in telephone line. This time our computer will be analog. We can ask this question do we need digital ? Digital may be easy but we can always make abstractions and make the interface easy. For example analog calculation core with digital interface is always possible. I am missing some points maybe, but it comes into my mind. We need analog frequency holder memories , multiplexers , mixers and may be ADC devices.