our voice, which is one that it is not discretized in any way
I don't agree. Singers play discrete frequencies (notes) like any other instrument. Vibrato, Glissando and Portamento are ornamentations or effects.
Your proposal is similar to
OSC, which was for some people the MIDI killer
The fact is that MIDI is more about music than a mere protocol for machines to talk among them. It is a music codification, a music language dialect, so musical symbols (like notes) are the core of it.