Here's the Circuit Design Lab (http://www.clarkson.edu/~svoboda/eta/Circuit_Design_Lab/circuit_design_lab.html) at Clarkson University's site. A pretty handy way to see sliding calculations while changing values in sample circuit applications, i.e. a voltage divider, inverting and non-inverting opamps, voltage control sources, pretty common stuff to pedals.
Seeing all the rest of the circuit values re-calculate when changing one seems to help me grasp the real world use of the math, maybe somebody reading this knows what I mean...
GREAT link! Thank You !
cool cool