well, the moog sound is created from the typical moog ladder filter. The Moog ladder filter is made by cascading four basic filterblock sections that each have a cutoff slope of 6dB per octave. An individual filterblock section is commonly named a pole, a name derived from a parameter when doing calculations while designing a filter. A pole is not really an actual discrete electronic circuit, but as many manufacturers have used the word pole for so many years it has become common to talk about two-pole filters, four-pole filters, multi-pole filters, etc. The minimoog/prodigy use such a filter, 4 x the 6dB filterblock creates a 24dB cutoff slope which makes it sound subtle, less poles used make the sound harsh. The waveform used for the typical bass lines are sine with a cutoff on the LP filter ( always LP on th vcf, sometimes you'll find a HP filter in after the mixer section or VCA, this in order to tailor the sort of sound. Leads will use that HP filter and bass will use the LP at the VCF stage. This way you wont need a lot of eq' on either leads or basses, filters are eq's in general ). So this is the principle but the moog sound is derrived from...moog so in order to gain that sound you'd need a moog or try the vst moog modular by arturia or some of minimoog vsts ( I posted one some time ago ), although hardware is much better. Studio Electronics make the best hardware moog copies in the form of the atc and se models but for the same price you can also look at the Moog little phatty.