[sdiy] 1 Meg input level pots?

[JAMES GALLANT]

      A while back I bought several very high quality 1 Meg linear panel 
mount pots for way-mass-cheap.  It seemed like a good idea at the time.  I'd 
like to use these as input attenators for a modular synth but most of the 
circuits I've seen use input atenuator pots in the 50K to 100K range - give 
or take.

      If I understand what I've read correctly the big drawback to high R 
value pots is that they add (thermal ?) noise to the signal.  Now to my way 
of thinking (no EE in this neighborhood) this shouldn't be much of a problem 
for control voltages but audio signals may be another matter.  I'm pretty 
sure that there's a good reason why nobody, as far as I've been able to 
find, uses 1 Meg pots for input level control for any reason.

      Since I would be basically using them as voltage dividers, I have to 
ask, what bad thing happens if I go ahead and throw caution to the wind and 
use these things for input level control pots ?

       If my question results in a "burn the infidel" reaction in you, 
perhaps you could offer some pointers as to what they could be used for in 
an analog application.

      Thanks in advance,

James