Quote Originally Posted by Gazjam View Post
Your right Martin.

Though voltage is also a varying voltage.

Its analogue...conceptually speaking (which wot I waz)
I.e. its not 'on' or 'off'

Its ALL analogue.
It's a waveform.

My point was that voltage (of any flavour) is subject to external factors, electrically speaking.

And yup,
The output stage just reflects what's came before, kinda like Ivor Tefunbruns's 'garbage in garbage out' analogy...

(i'll get my coat)
yes you are right, voltage is analogue.