The magic is the linearity of the signals. They are additive. The different signals pass through the same stream of samples without interacting.
If you add volumes from sine wave in 400 Hz to sine wave in 300 Hz, you can transfer them together in a stream of samples , then separate them later.
Mathematically: f(at + bt) = af(t) + bf(t)
The magic is the linearity of the signals. They are additive. The different signals pass through the same stream of samples without interacting.
If you add volumes from sine wave in 400 Hz to sine wave in 300 Hz, you can transfer them together in a stream of samples , then separate them later.
Mathematically: f(at + bt) = af(t) + bf(t)