[HAM] Overdrive

[OF]

At 09:02 PM 11/14/2006, wtimm6801 at aol.com wrote:
>  Hello, I've read the articles saying how to add gain to the preamp AO28 
> swell capacitor for 
> overdrive. 
> (http://www.dairiki.org/HammondWiki/HowtoAdjustThePreampDriveLevel)  It 
> seems by this method that you have to have the expression pedal floored, 
> the leslie volume knob to 10, and the organ loud as hell to get the 
> growl.  My question is, how do players like Jimmy Smith or Gregg Rolie 
> get that great overdrive sound from, say, playing 868000000 on the lower 
> manual and a half leaned expression pedal at low volumes?  Exactly what 
> amp is overdriving, the Hammond or the Leslie's... or both?

Dylan,
Unless something is wrong with the organ, overdriven sound comes from the 
Leslie when the signal fed into it is "too hot."

I believe that Rolie played non-stock equipment but I could be wrong. In 
regards to Jimmy Smith, could you reference some recordings that have that 
sound on them? I don't really think of his recordings as having a real 
overdriven sound and I doubt that he would have wanted it. Also, Jimmy's 
lower manual setting was always 838 or occasionally 848, if it matters.