Paul Davis:
Just out of interest how much processor power
would it take to normalise
on the fly?
it doesn't need a CPU, it would need a time machine to travel into the
future to measure the loudest sample still to come.
Or a machine that somehow (for example by drugs
or electric signal connected to the brain) knocks out the
listener for a while so that the program can first find
volume level, and then replay it after waking up the user.