Jera Wolfe what fascinates me here with this at this low level of organization (echoic) is two things:
a) these are mechanical means to move the data from a continuum or stream into a combination of continuous and discrete.
So the experience of sound at this level consists of some discrete data that will continue on for further processing and also continuous data that will never make it into our long-term memory.
Our brains cannot process raw continual stream. But within a brief window we can directly experience some of it.
2) these are mechanical processes that take place over time.
This justifies two things to me:
I am justified in using discrete math, particularly computation.
I am justified in treating time as real and not an illusion.