To follow up, and believe me, I'm not trying to be a smartass here, unless you're Barbara Dennerlin (sp), it is very difficult to get anything more than a basic foundation out of pedal bass. That's why literally all the great jazz organist played left-hand bass, using the pedalboard only to add a little visual pizazz and put some "attack" on the bass note. And this was true even with the handful that were proficient on the pedals.

Good for ballads, waltzes, and 2/4; not much else. JMO.

chas