dave robinson wrote:I'm struggling to find anybody who knows what 'revese audio taper not linear' means.
Does it mean a log pot instead of linear ?
As you suggest, "audio" means "log
[arithmic]", as opposed to linear.
Linear pots can be used either way round without difficulty; that is, you can wire it up for maximum resistance either clockwise or anti-clockwise. So there is no need for a reverse linear pot.
Log pots, on the other hand, have a resistance curve which is different at each end of the sweep (optimised for the way we perceive loudness). If you want one to use as a left-hand volume control, it will either work clockwise 0-10 like any other pot, or, if you get a reverse taper log pot, it can be wired up to produce 0 at the clockwise end of the control's sweep.
Did you know that the double-ganged pot used for the tone control in a DeArmond 610 has one log pot and one anti-log pot on the same shaft? That's because when moving the treadle left or right, one parameter (of bass or treble) is being increased whilst the other is being decreased. The two-pot tone control is the reason why the DeArmond works better than the superficially-similar Fender tone/volume pedal.