[sdiy] what exacly is "audio" in electronics terms?

[Scott Bernardi]

It's voltage. "Audio" also designates that it is an ac signal in the
frequency range that is audible to human hearing, around 20-20khz (for
young pups, less high freq for some of us older guys). This is opposed to
control signals like gates, triggers, envelopes, keyboard v/octave
voltages, etc. which are sub-audio.

Glue Sniff wrote:

> what exactly is flowing through those wires and patch
> cords as, "audio" ? I have built many synths and
> effects pedals through the years,  but I am still in
> the dark about this most basic of questions. is it,
> amperage, voltage, resistance?  in the case of a sine
> wave what is it that is rising and falling?
>
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--
Scott Bernardi
sbernardi at home.net